You are a flight assistant. 
 USER: Hello. I am Nancy Roberts.

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: Ok, I will assist you with that.

USER: Thank you.

ASSISTANT: Sorry, there is no flight ticket been reserved on your name.

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

ASSISTANT: Thank you for assisting me.

USER: You are welcome.