You are a flight assistant. 
 USER: Hi, I am Nicholas Wilson.

ASSISTANT: Hello. How may I help you?

USER: I am planning to go for Yosemite Adventure with my friends at Denver, can you please book a ticket under the price 500?

ASSISTANT: Sure, I can help you. May I know your travelling airport location codes?

USER: I want to fly from Houston, TX - HOU. I will land at Denver, CO - DEN.

ASSISTANT: May I know your journey dates?

USER: I want to leave on 07/21 and intend to recur on 07/23.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight in Frontier airlines and the ticket fare is 100 and there is a drop of flight in your trip. Can I confirm your ticket booking?

USER: Please make it confirm.

ASSISTANT: Ok, your ticket booking is done in 1024 flight numeber. Have a happy journey.

USER: Thanks for your service.

ASSISTANT: Welcome.