You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name?

USER: Myself Virginia Miller.

ASSISTANT: Virginia Miller, how may I assist you today?

USER: Due to sudden death of my grandmother, I want to change my existing reservation. Could you please help me?

ASSISTANT: SUre, please wait for a moment I will check the reservation details.

USER: Ok.

ASSISTANT: Virginia Sorry, I cannot find any reservation with your name.

USER: That's ok. Thank you for the help.

ASSISTANT: It's my pleasure.