You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight ticket from JFK to IAH to meet my friends. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are Nov 21 and Nov 23.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No, I do not have any other requirements.

ASSISTANT: May I know your name?

USER: William Green here.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for opting us.