You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, help me with your name please?

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

ASSISTANT: I will help you. To help you, let me know your name please.

USER: Matthew Allen here.

ASSISTANT: Thanks for your name. Matthew Allen, sorry there was no reservation on your name to change.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for picking us. Have a nice day.