You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Can you please book a flight ticket from IAD to BOS?

ASSISTANT: May I know your travelling dates?

USER: My trip dates are 02/28 and 03/01.

ASSISTANT: Please let me know your connection limit?

USER: I am comfortable to travel in a single connecting flight.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: May I know your name please?

USER: Matthew Parker here.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.