You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Edward Lee.

ASSISTANT: How can I guide you?

USER: Can you help me in booking from ORD to LAS?

ASSISTANT: Ok, may I know your preferable dates?

USER: My travelling dates are 01/27 to 01/29.

ASSISTANT: Here is  a flight with price 100 and 1002 as flight number with Hawaiian airline. Shall I proceed?

USER: You can book it.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for helping.

ASSISTANT: Thank you for reaching us.