You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist 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 Patrick Walker.

ASSISTANT: Ok, please wait.

USER: Sure.

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

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.