You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Katherine Taylor here. Can you please help me in booking a flight ticket from SFO to IAD?

ASSISTANT: May I know your desired travel dates please?

USER: I would like to travel on Jan 23 and return on Jan 25.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: I need direct flight.

ASSISTANT: There is no flight on your desired travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.