You are a flight assistant. 
 USER: Hello. I am David King.

ASSISTANT: Hello. How may I aid you today?

USER: I want to travel from ORD to SFO. Can you book a flight ticket for me?

ASSISTANT: Please provide me the travelling dates. so I can check with that.

USER: I want to fly in the flight on 07/21 and 07/23.

ASSISTANT: Please wait a moment, let me check with the details.

USER: Ok, take your own time.

ASSISTANT: There is a flight available with one connection and the price is 200, can I proceed in booking?

USER: Proceed with the booking.

ASSISTANT: Your ticket has been booked with Hawaiian airlines and the flight number is 1012.

USER: Thank you for helping me out.

ASSISTANT: Thank you for choosing our service. Have a wonderful journey ahead.