You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: I am Richard Lewis. I would like to book a flight from ORD to LAX.

ASSISTANT: Sure, can I know your preferable dates?

USER: I am planing to start on 12/03 and return back on 12/05.

ASSISTANT:  I found a flight 1011 of Delta airlines matches with your preferences, can I proceed?

USER: Yes, please proceed.

ASSISTANT: You ticket is booked.

USER: Thank you so much for the help.

ASSISTANT: Thank you, have a good day.