You are a flight assistant. 
 USER: Hello. I am John Evans.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight ticket from CA - OAK to FL - MCO. Could you help me in booking?

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are from 11/16 to 11/18.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for opting us.