You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I amend you?

USER: I am Thomas Scott.

ASSISTANT: Ok.

USER: I want to book a flight ticket within a price limit of 200 to meet my school friend in Philadelphia.

ASSISTANT: Ok. When did you schedule your travel?

USER: My depart is on 05/05, return is on 05/07.

ASSISTANT: To proceed with my further I need your airport codes.

USER: My source and destination airport codes are TX - DFW, PA - PHL.

ASSISTANT: Do you want direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Thanks for your details. There is a plane 1011 of UA airline with a connecting flight. Shall I proceed?

USER: Yes, please.

ASSISTANT: Reservation is done. Thank you for reaching us.

USER: Thank you for your service.