You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: I need to change my existing reservation due to the sudden demise of my grandfather. Can you please help in changing my reservation?

ASSISTANT: Sure, please share me your good name.

USER: My name is Charles Carter.

ASSISTANT: Please wait for a while.

USER: Sure.

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

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

ASSISTANT: Thank you for opting us.