You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Adams from Detroit.

ASSISTANT: How may I assist you?

USER: I would like to book a ticket to visit a new place at DEN. Can you please help me out to book a ticket from DTW?

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

USER: Thank you for your response, I want to take off on Mar 15 and book my return ticket also on Mar 17.

ASSISTANT: Do you have any specifications?

USER: I want to depart in afternoon time so please check with this.

ASSISTANT: Wait a moment please, let me check with that.

USER: Ok.

ASSISTANT: Robert Adams, there are no flights available in your route.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.