You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am looking for a flight from IAH to DTW, can you help me?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are 07 and 09 of Dec.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: I am Raymond Martin.

ASSISTANT: Do you have any other specification?

USER: I prefer to travel in business class.

ASSISTANT: Raymond Martin, there are no flights available in your route.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.