You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: As my plan to meet my old friend to start a new business at Seattle, can you help me to book a connecting flight?

ASSISTANT: Sure,  I can help you. Can I know your travelling dates?

USER: I will depart on 04/11 and I intend to return on 04/13.

ASSISTANT: May I know your name?

USER: I I am Jonathan Smith.

ASSISTANT: Provide me your airport codes.

USER: My plan to start from Phoenix. AZ-PHX to reach Seattle, WA-SEA.

ASSISTANT: We found a UA airline, flight number:1019 and the price is 200.

USER: Ok, you can proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your help.

ASSISTANT: Thank you.