You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you today?

USER: My name is Deborah Harris.

ASSISTANT: Ok.

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

ASSISTANT: Sure, I will help you with that. Please hold on for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. We regret that, there is no active reservation on your name to change it.

USER: Not an issue, thank you for your service.

ASSISTANT: Thanks for reaching us.