You are a flight assistant. 
 USER: Hi. Betty Lopez here.

ASSISTANT: Hello, how may I aid you today?

USER: I want to do some changes in my existing flight reservation. Can you help me?

ASSISTANT: Sure, we are happy to help you.

USER: Ok.

ASSISTANT: Your reservation is found, please share me your airport codes.

USER: The airport codes are from LAX to JFK.

ASSISTANT: May I know your travel dates?

USER: My travel dates are from July 19 to July 21.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Is there any time concern for you?

USER: The depart time would be evening.

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

USER: I am Betty Lopez.

ASSISTANT: May I know your airline preferences for you?

USER: No more preferences. You search for the flight.

ASSISTANT: We found a Spirit airline and 1019 is flight number with a fare of 100. Shall I proceed?

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

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.