You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am looking for a flight from EWR to SFO, can you help me out?

ASSISTANT: May I know your trip dates?

USER: Sure, my trip dates are from Apr 8th till Apr 10th.

ASSISTANT: Do you have any connecting preferences?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any other concern?

USER: No, thanks.

ASSISTANT: May I know your name please?

USER: Myself Shirley Nelson.

ASSISTANT: No flights found as per your preferences in our database.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.