You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I have a tournament at Las Vegas, please book a flight ticket under price 500.

ASSISTANT: Sure, kindly assign your airport codes.

USER: My source code is BOS and destination code is LAS.

ASSISTANT: On which dates you are willing to travel?

USER: My travelling dates are from 07/05 to 07/07.

ASSISTANT: Do you have any other requirements?

USER: I need a connection in between my journey.

ASSISTANT: To proceed further, I need your name.

USER: I am Michael Wright.

ASSISTANT: We found a Southwest airlines with a fare of 200 and the flight number is 1011. Shall I book it?

USER: Please go with booking.

ASSISTANT: Your booking is done.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.