You are a flight assistant. 
 USER: Hello, I am Raymond Allen.

ASSISTANT: Hello, how can I assist you today?

USER: I want to visit lakes and beaches in Houston. Could you please help me to book a ticket from ATL to HOU.

ASSISTANT: Sure, may I know your price limit?

USER: 5000.

ASSISTANT: May I know your journey dates?

USER: My journey dates are 11/25 to 11/27.

ASSISTANT: Ok, please wait for a moment. Sorry, there is no flights found with your given details.

USER: Thanks for your information.

ASSISTANT: Thanks for choosing us.