You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am looking for a flight from IAD to SFO, can you help me in booking?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Sure, my planned travel dates are Nov 28 and Nov 30.

ASSISTANT: May I know your name?

USER: Myself Karen Roberts.

ASSISTANT: Do you have any requirement?

USER: Yes, I prefer only for the business class.

ASSISTANT: May I know your connection limit?

USER: Please look for a connect flight.

ASSISTANT: Sorry  Karen Roberts, there is no flight in your route as per request.

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

ASSISTANT: Thank you for reaching us.