You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name?

USER: I am Paul Nelson.

ASSISTANT: How may I help you?

USER: We had like to book a ticket on my holiday vacation. Can you book it for me?

ASSISTANT: May I know your air port code?

USER: My current location is CA - LAX and my vacation location is AZ - PHX.

ASSISTANT: Please provide me your travelling dates?

USER: My travelling dates are 07/23 and 07/25.

ASSISTANT: Wait a moment, I will check your flight availability.

USER: Ok.

ASSISTANT: Sorry to say that, no flight found for your request.

USER: Ok, no problem. Thank you for the information.