You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to change in my plan, I would like to change my recent reservation.

ASSISTANT: Sure, may I know your name?

USER: My name is Nancy Rodriguez.

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

USER: That's fine. Thank you for your information.

ASSISTANT: Ok, thank you for approaching us.