You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Amanda Scott. Owing to an emergency, I want to change an existing reservation. So please help me in changing the reservation.

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Sure.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.