You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency, I want to change my existing reservation.

ASSISTANT: Sure, can I have your name please?

USER: Sure, Laura Campbell here.

ASSISTANT: Ok, please wait.

USER: Sure.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.