You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I would like to make few changes in my previous reservation, can you help me?

ASSISTANT: Sure, may I know your name?

USER: I'm Carolyn Davis.

ASSISTANT: Sorry Davis, no reservation found on your name.

USER: That's fine, no issues with it. Thank you for checking with my reservation.

ASSISTANT: Thank you for contacting  us.

USER: You are welcome.