一、Dear sir/madam: 

    Im delighted you have accepted our
    invitation to speak at the    Conference
    in [city] on [date]. 

    As we agreed, youll be speaking on 
    the topic from [time] to [time]. There
    will be an additional minutes for questions.
    Would you please tell me what kind of 
    audio-visual equipment youll need. If you 
    could let me know your specific requirements
    by [date], Ill have plenty of time to make 
    sure that the hotel provides you with what 
    you need. 

    Thank you again for agreeing to speak.
    I look forward to hearing from you. 

    Sincerely yours,

    [name]

    [title]

    二、Dear sir/madam: 

    Thank you for your letter of [date]. 

    Im glad that you are also  going to [place]
    next month. It would be a great pleasure 
    to meet you at the [exhibition/trade fair].
    Our company is having a reception at 
    [hotel] on the evening of [date] and I would
    be very pleased if you could attend.
    I look forward to hearing from you
    soon.

    Yours sincerely, 

    [name]

    [title]

    三、Dear sir/madam: 

    [organization] would very much like 
    to have someone from your  company speak 
    at our conference on [topic]. 

    As you may be aware, the mission of 
    our association is to promote . Many of
    our members are interested in the 

　　achievements your company has made in .
    Enclosed is our preliminary schedule for
    the conference which will be reviewed in 
    weeks. Ill call you [date] to see who from
    your company would be willing to speak to 
    us. I can assure you that well make everything convenient to the speaker. 

    Sincerely yours,

    [name]

    [title]

    四、Dear sir/madam: 

    We would like to invite you to an 
    exclusive presentation of our new [product].
    The presentation will take place at
    [location], at [time] on [date]. There will
    also be a reception at [time]. We hope you
    and your colleagues will be able to attend.
    [company] is a leading producer of
    high-quality . As you well know,

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    recent technological advances have
    made increasingly affordable to the
    public. Our new models offer superb 
    quality and sophistication with 
    economy, and their new features 
    give them distinct advantages 
    over similar products from other
    manufacturers.

    We look forward to seeing you on [date].
    Just call our office at [phone number] and 
    we will be glad to secure a place for you.

    Sincerely yours,

    [name]

    [title]

    五、Dear sir/madam: 

    On [date], we will host an evening
    of celebration in honor of the retirement 
    of 
    [name], President of [company]. You are
    cordially invited to attend the celebration 
    at [hotel], [location], on [date] from to p.m.  
    [name] has been the President of
    [company] since [year]. During this 
    period, [company] expanded its business
    from to . Now its our opportunity to 
    thank him for his years of exemplary 
    leadership and wish him well for a
    happy retirement. Please join us to 
    say Good-bye to [name].

    See you on [date].

    Yours sincerely

    [name]

    [title]

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