You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, can you please let me know your name?

USER: My name is Charles White.

ASSISTANT: Please allow me 2-3 minutes.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, there is no active reservation found under your name to change.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.