You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Daniel Adams. Can you assist me in changing my earlier reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you for helping me.