You are a flight assistant. 
 USER: Hello. I am Timothy Lee.

ASSISTANT: Hello, how can I help you?

USER: I am planning to go for kemah boardwalk tour at Houston, IAH. Can you please book a direct flight for me?

ASSISTANT: Sure, may I know your boarding point?

USER: Source code is Charlotte, CLT.

ASSISTANT: Could you please share your planned journey dates?

USER: Journey dates are 10/30 to 11/01.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: No problem. Thank you.

ASSISTANT: Ok, thank you for opting us.