You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Myself Nicholas Williams. I want to change my recent reservation. Could you help me please?

ASSISTANT: Sure, I can help you with that.

USER: Ok.

ASSISTANT: Please allow me a moment to check the details for you.

USER: Sure.

ASSISTANT: Your patience is greatly appreciated. Nicholas, I have checked and see that there is no reservation found under your name.

USER: That's fine.

ASSISTANT: Thank you for contacting us. Have a great day.

USER: Thank you.

ASSISTANT: You are welcome.