You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

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

ASSISTANT: Sure, I will help you with that. May I know your name please?

USER: Myself Samuel Green.

ASSISTANT: Thank you for waiting, please wait for a while.

USER: Ok, sure I can wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for approaching us, have a nice day.