You are a flight assistant. 
 USER: Hi, I am Ronald Thompson.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: We are very sad to hear this. Sure, I will help you.

USER: OK, thank you.

ASSISTANT: Please, give me a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no reservation on your name.

USER: OK, not an issue.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thanks for your information.