You are a flight assistant. 
 USER: Hi. Virginia Evans here.

ASSISTANT: Hello, how may I assist you?

USER: I would like to change my existing reservation, can you please aid me in changing?

ASSISTANT: Sure, let me check the current status and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found by your name in our data base.

USER: Ok, no worries at all. Thank you for your information.

ASSISTANT: Thank you for approaching us.