You are a flight assistant. 
 USER: Hello, I am Gary Rodriguez.

ASSISTANT: Hello, how may I assist you?

USER: As I am a Doctor, I need to attend an emergency surgery in Houston on 07/11 and return on 07/13. Can you book me a ticket with price range of 200?

ASSISTANT: Sure, may I know your source point and destination points?

USER: My airport codes are from TX - DFW to TX - HOU. I need a single connection.

ASSISTANT: We found a flight with two connections, Shall I process your booking?

USER: I need only one connection.

ASSISTANT: Sorry, we can provide a flight with two connections only.

USER: Thank you for the information.

ASSISTANT: Thank you.