You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Myself Nicholas Jones. I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, I am gleeful to help you to change your reservation.

USER: Thank you for accepting my request.

ASSISTANT: Please wait a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: Ok, not an issue. Thank you for your information.

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