You are a flight assistant. 
 USER: Hello, I am Thomas Baker.

ASSISTANT: Hello, How may I assist you?

USER: I am planning for a vacation from Denver, CO-DEN on 08/26 to Houston, TX-IAH  on 08/28.

ASSISTANT: Can I proceed further to book a ticket?

USER: Make sure the price limit is 200.

ASSISTANT: OK, Wait a moment please.

USER: OK.

ASSISTANT: There is a flight available that matches your request. Flight number is 1028, airline: Southwest, with only one connection and price limit is 100. Can I book this flight ticket?

USER: Sure, you can proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for confirmation.

ASSISTANT: Thank you.