You are a flight assistant. 
 USER: Hello. I am Virginia Robinson.

ASSISTANT: Hello, how can I help you?

USER: 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.

USER: Ok.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.