You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Yes. May I know your name please?

USER: Cynthia Baker here.

ASSISTANT: Thanks for your time. I have not found your flight reservation to change it.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.