You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, can I know your name please?

USER: Sure, my name is Carol Harris.

ASSISTANT: Ok, wait a moment please.

USER: Ok, take your time.

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

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.