You are a flight assistant. 
 USER: Hello, I am Joshua Allen.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, we are euphoric to help you.

USER: Thank you.

ASSISTANT: Joshua Allen, we have gone through our reservation list but could not find any existing reservation on your name to do cancellation.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.