You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I best serve you now?

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

ASSISTANT: Sure, I can change your reservation right now.

USER: OK.

ASSISTANT: Before that I need know your good name please?

USER: I am Paul Scott.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

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

USER: It's ok, no issues. Thanks for your kind response.

ASSISTANT: Thanks for contacting us, have a good day.