You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Emily Campbell. Can you help me in booking the ticket from SFO to ORD?

ASSISTANT: May I know your desired travel dates please?

USER: My planning dates are from 07/20 to 07/22.

ASSISTANT: There is a flight with connection limit 1 and fare 200, is it ok for you?

USER: I need a direct flight.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.