You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I serve you?

USER: I am Gary Campbell. I want to book a flight ticket to Philadelphia.

ASSISTANT: Ok.

USER: I am planning to attend public exam at Philadelphia on 05/06, can you please reserve the flight ticket?

ASSISTANT: Sure. When do you have  to return?

USER: I have to return on 05/08.

ASSISTANT: May I know your airport codes please?

USER: Source and destination airport codes are EWR and PHL.

ASSISTANT: Do you have any price limit?

USER: Price limit is 200.

ASSISTANT: Please give me a minute to check for the flight availability.

USER: Sure.

ASSISTANT: Thanks for you time, there was a single connecting flight of UA airline with 1009 number and price 100. Shall I move forward with booking?

USER: Sure, please book the ticket.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thanks for reaching us, have a safe journey.