You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of help are you seeking from our end? Please let me know, so I can help you with it.

USER: I would like to change my recent reservation, due to sudden demise of my great grand father. Can you please help me with this?

ASSISTANT: Ok, please allow me to check for your existing reservation for a moment.

USER: Sure, my name is Donna Martin.

ASSISTANT: Sorry to inform you Donna Martin, there is no active reservation by your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching our services.

USER: Thank you for the information.

ASSISTANT: Have a nice day.