You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I help you today?

USER: Please book a ticket from Phoenix.

ASSISTANT: Sure, can I know your trip dates?

USER: Departure will be 01/21 and return is 01/23.

ASSISTANT: May I know your Phoenix airport code?

USER: Airport code is AZ-PHX.

ASSISTANT: Where do you want to land at?

USER: Landing is at TX-DFW .

ASSISTANT: Hold on a minute.

USER: Ok.

ASSISTANT: We found a direct flight to your destination place. Can I proceed for booking?

USER: Can you provide a connecting flight.

ASSISTANT: No, we can't provide it currently.

USER: Thanks for the help.

ASSISTANT: May I know your name?

USER: My name is Larry Baker.