You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Sharon Collins here. My wedding venue got changed, so I want to amend my existing reservation.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation found under your name to change it.

USER: It's ok, thank you.

ASSISTANT: Thanks for approaching us.