You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Deborah Jackson from Detroit. Can you please book a flight ticket from DTW to DEN?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you for your positive response, I want to take off on 06/07 and please confirm my return ticket also on 06/09.

ASSISTANT: Sorry, there are no reservations found in our database.

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

ASSISTANT: Thank you for choosing us.