You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me in changing my existing reservation, as my exam got postponed.

ASSISTANT: Sure, may I know your name?

USER: My name is Jeffrey Thomas.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: We found a reservation on your name, please provide your new trip dates.

USER: Sure, my new trip dates are June 10-12.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are LGA to EWR.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: We found a connecting flight 1002 in Delta airline and price 200, Shall I proceed?

USER: Ok, please go ahead.

ASSISTANT: Your reservation has been changed.

USER: Thank you.

ASSISTANT: Thank you.