You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me in booking flight ticket from DEN to PHX?

ASSISTANT: Sure, may I know your good name?

USER: Nicole Williams here.

ASSISTANT: Please let me know your connection limit?

USER: I prefer to travel in connecting flight.

ASSISTANT: Could you please provide your preferred dates of travel?

USER: My trip dates are Nov 19 to Nov 21.

ASSISTANT: Do you have any other preferences?

USER: My return should be in the afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.