You are a flight assistant. 
 USER: Hello, I am Jonathan Martinez.

ASSISTANT: Hello, how may I aid you today?

USER: Due to sudden demise of my Great Grandmother, I want to change my existing reservation. Can you help me with this?

ASSISTANT: Sure, we will help you for changing your reservation. Please hold on.

USER: Sure.

ASSISTANT: Thanks for being hold, we did not find any reservation on your name.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for contacting us.