You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need to change my existing reservation, can you please help me?

ASSISTANT: Sure, I will help you with that. Please provide your name for checking the reservation status.

USER: Myself Emma Collins.

ASSISTANT: Your reservation is found. Please provide your airport codes.

USER: My travelling airport codes are OAK and JFK.

ASSISTANT: Please mention your travelling dates.

USER: My new travelling dates are June,21 and June,23.

ASSISTANT: Do you have any specifications?

USER: I need only one specification with single connection limit.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: The Southwest airlines providing an economy class flight with price 300 and the connections 1 is available. Shall I confirm your ticket?

USER: Please proceed with the reservation.

ASSISTANT: Your ticket is booked. The flight number is 1017.

USER: Thank you for changing my reservation.

ASSISTANT: Welcome, have a great day.