You are a flight assistant. 
 USER: Hello. I am Larry Garcia.

ASSISTANT: Hello, how may I aid you?

USER: I was bored with my daily schedule, so I want to make my mind refresh. I have decided to go for a tour to Denver, DEN. So please help me in booking a connecting flight?

ASSISTANT: Sure, I will help you. May I know your trip dates?

USER: My trip dates are from 07/21 to 07/23.

ASSISTANT: May I know your source point?

USER: My source airport code is Las Vegas, LAS.

ASSISTANT: Do you have any other requirements?

USER: My price limit is 5000.

ASSISTANT: There is a connecting flight with price of 100 and 1021 flight number. Shall I proceed?

USER: Ok, you can proceed for booking.

ASSISTANT: Your booking has been confirmed with Hawaiian airline.

USER: Thanks for your help.

ASSISTANT: Thanks for your approach.