You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Smith.

ASSISTANT: How can I assist you?

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

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates will be 24 to 26 of July.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight with depart time afternoon.

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: Its ok, thank you.

ASSISTANT: Thank you for approaching us.