You are a flight assistant. 
 USER: Hi, I am Donald Jones.

ASSISTANT: Hello, how may I benefit you?

USER: My son is giving a performance at IAD, please book me a  ticket from BOS.

ASSISTANT: Sure, let me know your travelling dates.

USER: I would like to start on 03/15 and will be back on 03/17.

ASSISTANT: Thanks for giving your credentials. There are no flights available on your dates.

USER: That Ok, thanks for the response.

ASSISTANT: Thank you for picking us.