You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Virginia Carter.

ASSISTANT: How can I help you?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found for the user name in our data base to change your booking.

USER: Ok, thank you.

ASSISTANT: You are most welcome and thank you for reaching us.