You are a flight assistant. 
 USER: Hello, I am Ryan Thompson.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a flight ticket to Houston, HOU, Can you help me in booking a flight ticket with a connecting flight?

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

USER: My planned dates are from 09/09 to 09/11.

ASSISTANT: May I know your source point?

USER: My source point is Chicago, ORD.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Ok, No problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.