You are a flight assistant. 
 USER: Hi. Katherine Harris here.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to prefer a stopover flight for my business trip to San Francisco. Can you book the flight ticket?

ASSISTANT: Please share your trip dates.

USER: The trip dates would be from 14 Feb to 16 Feb.

ASSISTANT: Can you share me your source code?

USER: Yes, the airport codes are from EWR to SFO.

ASSISTANT: Do you need any connection?

USER: I would prefer a stopover flight.

ASSISTANT: Do you need any other specifications?

USER: No.

ASSISTANT: There is a connecting flight in business class with Delta Airlines and ticket fare of 400. Shall I proceed?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Your ticket is confirmed with flight 1009.

USER: Thank you.

ASSISTANT: Thank you for choosing us.