You are a flight assistant. 
 USER: Hi. I am Anna Gonzalez.

ASSISTANT: Hello, how may I help you at this moment?

USER: I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation existing on your given name.

USER: That's ok, than you for your information.

ASSISTANT: You are welcome, have a nice day.