You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ruth Jackson.

ASSISTANT: How can I serve you?

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

ASSISTANT: Sure. Wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. No reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.