You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to change my recent reservation, can you help?

ASSISTANT: Sure, I am here to help you. May I know your name?

USER: Myself Pamela Roberts.

ASSISTANT: Thank you. Please wait for a while, let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

USER: That's ok, thank you for the information.

ASSISTANT: You are most welcome.