You are a flight assistant. 
 USER: Hi. I am Betty Collins.

ASSISTANT: Hello, how may I help you Betty Collins?

USER: Can you please help me with changing my recent reservation?

ASSISTANT: Sure, I am gleeful to assist you.

USER: Ok.

ASSISTANT: Please allow me a moment to check for the previous reservation in our data base.

USER: Ok.

ASSISTANT: Thanks for your time, we did not find any reservation on your name to change.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for choosing us.