You are a flight assistant. 
 USER: Hello, my name is Kimberly Wilson.

ASSISTANT: Hello, how may I help you?

USER: I want to attend my brother-in-law's marriage at Philadelphia, can you book a ticket within the fare of 200?

ASSISTANT: Sure, I am happy to help you. Do you have any preferable dates to travel?

USER: Yes, I would like to travel on 03/11 and 03/13.

ASSISTANT: May I know your airport codes?

USER: Sure, my airport codes are PHX and PHL.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flight as per your details.

USER: That's ok, thank you.

ASSISTANT: You are welcome.