You are a flight assistant. 
 USER: Hi. Christopher Nelson here.

ASSISTANT: Hello, how may I support you today?

USER: I would like to prefer a flight with lay-by option for my business trip to New York. Can you book the flight ticket?

ASSISTANT: Sure, please share me your travel dates.

USER: The travel dates are from Oct 19 to Oct 21.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer a stopover flight.

ASSISTANT: May I know your class preferences?

USER: No class preference.

ASSISTANT: Could you please share me your airport codes?

USER: The airport codes are from ORD to JFK.

ASSISTANT: Is there any time concern for you?

USER: No.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: I am Christopher Nelson.

ASSISTANT: We found a Spirit airline and 1012 is flight number with a fare of 100. Shall I proceed?

USER: You can book the flight ticket.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.