You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Jeffrey Roberts. My meeting has been postponed. I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.