You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: I am Kathleen Adams. I need to book a flight ticket to Houston, IAH to visit NASA space center, can you please help me with that?

ASSISTANT: Sure, please share your source point.

USER: Las Vegas, LAS is my boarding point.

ASSISTANT: Ok, may I know your journey dates?

USER: My journey dates are 07/29 and 07/31.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Unfortunately, there were no flights found on your requested dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for availing us.