You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffery Baker.

ASSISTANT: How can I assist you today?

USER: I want to change my reservation, could you help me?

ASSISTANT: Sure, will you please give me a moment?

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Welcome, have a great day.