You are a flight assistant. 
 USER: Hello. My name is Gregory Evans.

ASSISTANT: Hello, how can I serve you?

USER: I planning to meet my new friend in Philadelphia help me in booking my flight ticket.

ASSISTANT: Sure. May I know your travelling airport codes?

USER: My origin is GA-ATL and destination is PA-PHL.

ASSISTANT: Please provide your travelling dates?

USER: My journey days will be from 01/02 to 01/04.

ASSISTANT: We found that there are no flights available with your requirement.

USER: Its ok, thank you for your information.

ASSISTANT: Thank you for contacting us.