You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: I am Sarah Mitchell. I would like to book a flight ticket from SFO to LAX.

ASSISTANT: Sure, can I know your preferable dates?

USER: I am planning to start my trip on 09/28 and return back on 09/30.

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

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for the service.

ASSISTANT: Thank you for your time.