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

ASSISTANT: Hello, how can I help you?

USER: I need to attend an emergency surgery in Houston, Can you book me a ticket with single connecting flight?

ASSISTANT: Sure. Please provide me travelling dates?

USER: I start on 12/10 and return on 12/12.

ASSISTANT: Do you have any price limit?

USER: The price limit is 500. My source is CO - DEN and destination is TX - IAH.

ASSISTANT: We found a 1009 Southwest airline with single connection and price of 200. Shall I proceed with booking?

USER: You can confirm the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the response.

ASSISTANT: Thank you for reaching us.