You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I want to change my business to another place, so please help me in change in existing reservation. I am Janet Davis.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Please provide your details for change the reservation.

USER: My source:LGA, Destination:JFK. Travel dates are 09/18 to 09/20. With one connection limit.

ASSISTANT: May I know the price limit?

USER: Price limit is 200.

ASSISTANT: We found a flight from Southwest airline with flight number 1018.

USER: Ok, please proceed to book.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your quick response.

ASSISTANT: Thank you, Have a happy journey.