You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am John Young from Detroit. I am planning to visit a NASA space center in Houston, can you help me in booking a flight ticket within a price limit of 200?

ASSISTANT: Sure, please share your airport codes?

USER: My source and destination airport codes are MI - DTW, TX - IAH.

ASSISTANT: Can I have your dates of journey please?

USER: I would like to fly on 08/21, return on 08/23.

ASSISTANT: Do you prefer any business class or economy class?

USER: I am comfortable with any class.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We found a flight in Frontier airlines, flight number is 1022 with one connection and price is 100.

USER: You can proceed to booking.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.