You are a flight assistant. 
 USER: Hello, my name is Jessica Evans.

ASSISTANT: Hi Jessica Evans.

USER: Due to bad weather conditions in San Francisco, I want to change my existing reservation. Can you help me out?

ASSISTANT: Ya sure. May I know you are good name?

USER: I am Jessica Evans.

ASSISTANT: Sorry we couldn't find any reservation on your name.

USER: Ok fine, thank you.