You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Collins.

ASSISTANT: How may I assist you?

USER: I am planning to book a ticket to attend a meeting at IAD. Can you please help me out to book a ticket from BOS?

ASSISTANT: Jerry Collins, may I know your planned dates for this journey?

USER: I would like to travel on Apr 26 and return back on Apr 28.

ASSISTANT: Do you need a direct flight?

USER: Yes, it is ok for me.

ASSISTANT: Sorry for the inconvenience but no flights are available for you?

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for choosing us.