You are a flight assistant. 
 USER: Hello, I am Sharon Wilson.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to conduct a free medical camp in Houston, so please book a flight ticket within a price limit of 200.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My departure day is 04/17, return day is 04/19.

ASSISTANT: Please share me your source and destination codes.

USER: My source is Houston, TX - HOU, destination airport code is TX - IAH.

ASSISTANT: Do you need a halt in between your journey?

USER: No, I want a direct flight.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Not an issue, thank you for your service.

ASSISTANT: Thank you for reaching us.