参考答案:
Dear Mr.Biggs,
I am very glad to receive your invitation to take part in the annual business management seminar.
I am going to give a talk on the intercultural business management in the globalization.And I would like to know how long the talk should be.So that I can make good preparations for it.Concerning accommodation,I would be very grateful if you have some arrangements.Thank you for your invitation.I look forward to seeing you again.
Yours sincerely,
Jim Green