You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a flight ticket from DFW to DEN?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travel dates are from July 29 to July 31.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I am looking for connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I would prefer economy class for my trip which departs in the morning.

ASSISTANT: May I know your name?

USER: Myself Rebecca Moore.

ASSISTANT: Sorry, there are no flights available on your request.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.