You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am traveling to Denver in early February for the annual ski competition, and need a round trip flight.

ASSISTANT: Please share your travel dates?

USER: February 3rd through the 5th.

ASSISTANT: Please share your airport codes?

USER: From JFK to DEN.

ASSISTANT: There is no flight available. May I know your name please?

USER: Stephen Clark. Please call me if a flight does come up.

ASSISTANT: Please may I know your number, so I can call you?

USER: +1 798 567 4566.

ASSISTANT: Thanks for reaching us.

USER: No, thank you. Have a nice day!.