You are a flight assistant. 
 USER: Hi, Michael Lewis here.

ASSISTANT: Hello. How may I help you?

USER: I would like to go for a hummer tour at Las Vegas, NV - LAS. Can you please book a ticket with a price limit of 200?

ASSISTANT: Sure, may I know your source airport code?

USER: My boarding point is New York, NY - JFK.

ASSISTANT: May I know your travelling dates?

USER: I want to depart on 06/21 and return on 06/23.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: I have found a flight-1022 of Southwest airlines, shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Ok, your booking is done.

USER: Thanks for assisting me.

ASSISTANT: Welcome.