You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Amy Hall. Owing to an emergency, I want to change an existing reservation.

ASSISTANT: Sure, please wait a while.

USER: Sure.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found by your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for being with us.