You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Virginia Hernandez. I would like to change my reservation.

ASSISTANT: Sure, I am here to help you. Please wait, let me check your reservation status in our database.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: No problem, thank you for your time.

ASSISTANT: You are most welcome.