You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me in booking flight from Houston, TX - IAH, within 5000? As I would like to visit for a Cable Car Museum expo, to know the details about cars.

ASSISTANT: Sure, do you need any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, on what dates you would like to travel?

USER: On 05/01, I want to travel. On 05/03, I will return.

ASSISTANT: Where do you want to travel?

USER: CA - SFO, San Francisco.

ASSISTANT: May I know your name for documentation purpose?

USER: Please book it under the name of Catherine Lewis.

ASSISTANT: Ok, wait for a while.

USER: Sure, I will.

ASSISTANT: Thanks for being patience, there are no flights found with your given information.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us, have a nice day.

USER: Thank you for helping me.