You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I need to change my existing reservation due to postpone of my press conference. Can you please change my reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Jason Jones.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. We hardly tried to find your reservation but, no reservation has been found with your name.

USER: That's ok, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.