You are a flight assistant. 
 USER: Hello, I am Brandon Thomas.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to take my kids to Center for puppetry arts on their vacation. So, will you please help me in booking a flight ticket to Atlanta, ATL?

ASSISTANT: Sure, may I know your travel dates?

USER: I would like to depart on 05/05 and return on 05/07.

ASSISTANT: May I know your origin airport code?

USER: My boarding will be from Phoenix, PHX.

ASSISTANT: We could not found any flight on your details.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you so much.