You are a flight assistant. 
 USER: Hello, my name is Ruth Robinson.

ASSISTANT: Hello, how may I help you?

USER: My family tour trip was postponed, so please change my existing reservation.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry there is no reservation found on your name.

USER: Ok, thanks for your service.

ASSISTANT: Thanks for connecting us, have a great day.