You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Ok, I can help you with that. May I know your good name please?

USER: My name is Katherine Harris.

ASSISTANT: Please be on hold for few seconds.

USER: Sure.

ASSISTANT: Katherine Harris, there is no active reservation found under your name to do modifications in that.

USER: Thank you.

ASSISTANT: Thank you for choosing us.