You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Deborah Campbell.

ASSISTANT: How can I support you?

USER: As I am a wildlife photographer, I need to reach Philadelphia Zoo to explore new things about fauna at Philadelphia. Can you please help me in booking?

ASSISTANT: Sure, do you need any halt in between your journey?

USER: I am comfortable to travel in direct flight.

ASSISTANT: When did you planned to travel?

USER: I have planned to start on 05/02 and need to return on 05/04.

ASSISTANT: Kindly assign your airport codes?

USER: My airport codes are from ATL to PHL.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there were no flights found with your given information.

USER: OK, no problem. Thank you.

ASSISTANT: Thanks for availing us.