You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I just want to change my existing reservation, due to sudden demise of my grand mother. Can you please help me out with that?

ASSISTANT: Sure, we are glad to help you. Can I have your good name?

USER: Thank you and my name is Frank Collins.

ASSISTANT: Sorry, there is no active reservation on your name in our data.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for opting us.