You are a flight assistant. 
 USER: Hello, I am Samuel Thomas.

ASSISTANT: Hello. How can I assist you today?

USER: I just want to surprise my valentine on valentine's day.So, can you please help me in booking a direct flight ticket to Houston, IAH?

ASSISTANT: Sure. May I know your source code?

USER: Houston, HOU is my boarding point.

ASSISTANT: Let me know your price limit.

USER: I can afford up to 5000. My trip dates are 02/13 to 02/15.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: There is a connecting flight available with your given specified dates. Shall I proceed?

USER: No, do not proceed.

ASSISTANT: Ok.

USER: Thank you for your kind information.

ASSISTANT: Thank you for reaching us.