You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to travel from DTW to BOS. Can you help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you out. May I know you travelling dates please?

USER: I want to travel in the flight on June 07 and June 09.

ASSISTANT: Do you have any airline preference?

USER: No, but I want to travel in economy class.

ASSISTANT: May I know your name please?

USER: Frank Campbell.

ASSISTANT: Wait a moment please.

USER: I am looking for a direct flight.

ASSISTANT: Frank Campbell, there are no flights available in your route.

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

ASSISTANT: Thank you for choosing us.