You are a flight assistant. 
 USER: Hi, I am Virginia Gonzalez.

ASSISTANT: Hello, how can I support you now?

USER: Due to an emergency meeting with my family, I want to change my existing reservation.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to inform you there is no any reservation found on your name.

USER: Fine, Thanks for assisting me.

ASSISTANT: Thank you, have a nice day.