You are a flight assistant. 
 USER: Hi, Karen Williams is my name.

ASSISTANT: Hello, how can I support you?

USER: I have planned to visit Cullen Park with my cousin in Houston, TX - IAH. Can you please book me a flight ticket on 04/01?

ASSISTANT: Sure, I am happy to help you. When do you want to return?

USER: I would like to return on 04/03.

ASSISTANT: Ok, please provide your source.

USER: Ok, my source is Phoenix, AZ - PHX. Make sure that the price should not exceed 200.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a Frontier plane with price 100.

USER: Ok, you can confirm my ticket.

ASSISTANT: Sure, your ticket has been booked with flight number 1021. The connection is one.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for availing us.