You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I abet you?

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

ASSISTANT: Sure, let me check the reservation list and revert you.

USER: Sure.

ASSISTANT: We could not find any reservation made by the name you mentioned above.

USER: Ok, no issue Thank you.

ASSISTANT: Thank you for reaching us.