You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to Global agency.

USER: You deal with booking the flight ticket?

ASSISTANT: Yes, how can I help you?

USER: Me and my friend planned to climb the Camelback mountain it's like race between our friends.The mountain is in Phoenix. Can you book the flight ticket for me?

ASSISTANT: Sounds good, please provide your source and destination airport codes?

USER: My airport source code is HOU, and departure airport code is PHX.

ASSISTANT: May I know your planned dates?

USER: My travelling dates are from 03/25 till 03/27.

ASSISTANT: Let me check for a best flight from HOU to PHX.

USER: Please, wait a moment let me check the flight.

ASSISTANT: May I know your name for further proceedings?

USER: Myself Elizabeth Parker.

ASSISTANT: Sorry Parker, we could not find available flights on your planned dates.

USER: That's ok, no issue.

ASSISTANT: Thank you for reaching Global agency.

USER: Thank you for your help.