You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I made an earlier reservation to attend a seminar, due to some issues it got postponed, so can you please change my reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Christine Williams.

ASSISTANT: Please wait for a minute.

USER: Sure.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.