You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you?

USER: I am Ryan Adams and I need to book a flight ticket to give an audition in Fox theater at Los Angels. Can you help me with it?

ASSISTANT: Sure, how much the fare should be?

USER: I can bare up to 200.

ASSISTANT: Please let me know your journey dates.

USER: I will depart on 09/25 and I intend to return on 09/27.

ASSISTANT: May I know your travelling airport codes?

USER: My source is AZ-PHX and my destination CA-LAX.

ASSISTANT: Ok, please wait for a minute. I will check and get back to you.

USER: Sure.

ASSISTANT: Thank you for being patient. There is no flight found matching with your specifications.

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for approaching us.