You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you for the day?

USER: I am Jennifer Campbell. My family tour trip got postponed, so I want to change an existing reservation.

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.