You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I would like to travel from LGA to OAK. Can you please help me in booking the flight ticket?

ASSISTANT: Sure, May I know the journey dates?

USER: My journey dates are Nov 18 and Nov 20.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Please wait a minute.

USER: Ok, take your time.

ASSISTANT: May I know your name?

USER: My name is Margaret King.

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

USER: OK, thank you for the information.

ASSISTANT: Thank you for opting us.