You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning a business trip from SFO to LAX, can you book a ticket for me?

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are 09/18 and 09/20. I want to book a ticket in the name of David Wright.

ASSISTANT: Sure. I have found a flight for you in UA airline, shall I proceed booking?

USER: Ok, proceed.

ASSISTANT: Your ticket is booked successfully with flight number 1017.

USER: Thank you for booking.

ASSISTANT: Thank you for contacting us.