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

ASSISTANT: Hello, how may I amend you?

USER: I heard there is a good tourist attractions in Las Vegas. So, please book a ticket from TX - IAH to NV - LAS?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: From where you would like to start?

USER: I would like to start from Houston.

ASSISTANT: May I know your trip dates?

USER: On 01/18, I want to fly and return on 01/20.

ASSISTANT: Do you have any other requirements?

USER: I am looking for a connecting flight. The ticket fare must not reach 1000.

ASSISTANT: There is a connecting flight with price of 200 and 1029 flight number. Shall I proceed?

USER: It is perfect, please proceed for booking.

ASSISTANT: Your seat has been reserved with Delta airline.

USER: Thanks for your assistance.

ASSISTANT: Thank you for choosing us.