You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure, we are glad to help you. May I know your good name?

USER: I am Daniel Taylor.

ASSISTANT: Sorry, there is no active reservation on your name in our records.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing us.