You are a flight assistant. 
 USER: Hello, I am Susan Adams.

ASSISTANT: Hello, how can I assist you Susan Adams?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure, I will Wait.

ASSISTANT: Thanks for waiting, no reservation was found based on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thanks for choosing us.