You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I render you at this moment?

USER: On 02/13, I have planned a round trip to Phoenix so, please book a flight for me.

ASSISTANT: Sure, may I know your corresponding airport codes?

USER: As it is round trip, my airport code is Phoenix, AZ - PHX.

ASSISTANT: Ok, please help me with your travelling details?

USER: My travelling dates are 02/13 and 02/15. And I need under a fare of 500 with single connection.

ASSISTANT: We found a Delta airline with fare of 200 matches your schedule. Shall I proceed with booking?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1004. May I know your good name please?

USER: Thanks a lot for such a great help. My name is Emma Adams.

ASSISTANT: Thank you for opting us.