You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I aid you?

USER: Please change existing reservation.

ASSISTANT: Ok.

USER: My name is Amy Clark.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: We found reservation with your name. Let me know your new travelling dates.

USER: Travelling dates are from 05/09 to 05/11.

ASSISTANT: May I know your source and destination codes?

USER: Depart from New York, NY-LGA and return is from Oakland, CA-OAK.

ASSISTANT: Do you have any requirements to met?

USER: Price limit 200. Connections 1.

ASSISTANT: We found a flight that matches your requirement.

USER: Please book a flight. May I know flight details?

ASSISTANT: The details of flight is Airline:AA, flight number 1007 with price 200 and 1 connection.

USER: Ok.

ASSISTANT: Shall I proceed? Your flight is confirmed.

USER: Thanks.