You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joseph Taylor.

ASSISTANT: How can I aid you now?

USER: I want to book a flight ticket from ORD to IAH. Could you help me in booking?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from Nov 23-25.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry, we have not found any flights running your desired routes.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for opting us, have a good day.