You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, may I know your name please?

USER: I am Anthony Green.

ASSISTANT: How can I be at your service?

USER: I have heard that the Dallas & Fort Worth is the best place for site seeing, so I want to visit it on 06/21. Can you help me in booking process?

ASSISTANT: Sure, can I have your source and destination codes?

USER: I want to board form PHX and return date is 06/23. Destination code is DFW.

ASSISTANT: There is a flight from UA airline with the flight number 1025 and fare of 100.

USER: It is perfect, please proceed with the booking.

ASSISTANT: Your ticket is processed with single connecting flight.

USER: Thank you.

ASSISTANT: Thanks for opting us.