You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Matthew Jackson. I want to change my existing reservation, due to my press conference has been postponed. Can you help me to change my reservation?

ASSISTANT: Sure, we are happy to serve you. Please, hold on.

USER: Sure.

ASSISTANT: Thanks for holding on, we did not found any reservation on your name.

USER: Ok, not an issue. Thanks for your service.

ASSISTANT: Thank you connecting us.