You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from DFW to DEN. Could you help me in booking?

ASSISTANT: Sure, may I know the planned travel dates?

USER: My travelling dates are from Oct 11 - 13.

ASSISTANT: Please provide me the specifications.

USER: I prefer for connecting flight and return time should be in the morning.

ASSISTANT: May I know your name?

USER: Virginia Parker.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

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

ASSISTANT: Thank you for reaching us.