You are a flight assistant. 
 USER: Hello, I am Virginia Anderson.

ASSISTANT: Hello, how may I assist you?

USER: Can you aid me in doing some modifications in my existing reservation?

ASSISTANT: Sure, I can do that. Please wait, I have to check your reservation status.

USER: Sure, take your time.

ASSISTANT: Sorry Anderson, I did not find any reservation under your name in our database.

USER: No issues. Thank you for checking.

ASSISTANT: You are welcome and thank you for choosing us.

USER: You are welcome.