dear sir/madam：

thank you for your letter of [date]. i’m 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]