You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to travel from OAK to LAS, please help me in booking my ticket.

ASSISTANT: Sure, may I know your travelling dates?

USER: My preferred travelling dates are 01/28 to 01/30.

ASSISTANT: Please wait for a moment. May I know your name?

USER: Myself Robert Green.

ASSISTANT: I have found a flight-1013 of Hawaiian airlines, shall I proceed?

USER: Yes, proceed and confirm my booking.

ASSISTANT: Sure, your ticket has been booked.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us, have a nice journey.