You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a ticket from Las Vegas, NV - LAS for a site seeing.

ASSISTANT: Sure, may I know the journey dates?

USER: My journey dates are on 12/27 and 12/29.

ASSISTANT: May I know your boarding airport and code?

USER: My destination is San Francisco, CA - SFO.

ASSISTANT: Ok, wait for a while.

USER: Ok.

ASSISTANT: You have a flight with one halt and price 100. can I proceed to book?

USER: Ok, please proceed for booking.

ASSISTANT: Ok, your ticket has been conformed.

USER: Thank you.

ASSISTANT: Thankyou for reaching us.