You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Ronald Davis.

ASSISTANT: How can I serve you?

USER: I need to book a flight from OAK to LAX, Can you please help me for booking?

ASSISTANT: Sure, I will help you with the booking.

USER: Thank you.

ASSISTANT: When you want to fly?

USER: I would like to start on 12/20.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: When you will return from LAX?

USER: I would like return on 12/22.

ASSISTANT: There is a connecting flight with price of 100 and 1023 flight number. Shall I proceed?

USER: Ok, proceed for booking.

ASSISTANT: Your booking has been confirmed with Frontier airline.

USER: Thanks for your information.

ASSISTANT: Thank you for choosing us.