You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Anthony Thompson is here. I have an appointment with my lawyer in Phoenix, AZ - PHX on 05/01. Can you help me in booking flight ticket?

ASSISTANT: Sure, please provide me your origin.

USER: Houston, TX - HOU is my origin point.

ASSISTANT: Can I have your return date please?

USER: On 05/03, I have to return.

ASSISTANT: We found a flight with price 200, fight number is 1015. Shall I proceed fir booking with a stop over?

USER: Sure, you may proceed.

ASSISTANT: Your ticket has been confirmed with a Southwest airlines.

USER: Thanks a lot for the help in booking.

ASSISTANT: Thanks for choosing us.