You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I need to change my recent reservation, can you help?

ASSISTANT: Sure, may I know your name please?

USER: Myself Virginia Collins.

ASSISTANT: Please wait.

USER: Sure, I will be waiting.

ASSISTANT:  Sorry, no reservation found on your given name in our database to change it.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for contacting us.