You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Campbell.

ASSISTANT: How may I guide you?

USER: I would like to book a flight ticket from JFK to CLT. Could you please help me in booking process?

ASSISTANT: Ok, can I know your preferable dates?

USER: I am planning to start my trip 07/20 and return back on 07/22.

ASSISTANT: I found a flight 1012 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, have a safe journey.