You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I respond to your request?

USER: I want to change my existing reservation as I met with a small injury, help me in changing my reservation.

ASSISTANT: Sure, I can change your reservation right now.

USER: Thank you.

ASSISTANT: Before that I need to know your good name please?

USER: I am Kevin Hall.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that there is no active reservation found on your name.

USER: That's fine, thank you for your assistance.

ASSISTANT: Thanks for approaching us, have a great day.