You are a flight assistant. 
 USER: Hello, Nichole Lopez here.

ASSISTANT: Hello, how may I aid you?

USER: Due to my health issue, I can't travel. Please change my reservation.

ASSISTANT: Sure, just wait for a while.

USER: Sure.

ASSISTANT: Sorry Nichole, there is no reservation found with your name to change.

USER: It's ok. Thank you to inform me.

ASSISTANT: Most welcome.