You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: On which dates are you going to travel?

USER: My planned travel dates are Nov 25 and Nov 27.

ASSISTANT: Do you need a connecting flight?

USER: Yes, please look for a connecting flight.

ASSISTANT: May I know your other specifications?

USER: I would like to return my journey for the morning flight in a business class.

ASSISTANT: May I know your name?

USER: Myself Kevin Walker.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

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

ASSISTANT: Thank you for choosing us.