You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ryan Parker.

ASSISTANT: How can I assist you Ryan?

USER: Due to some issue I just want to cancel my reservation, can you help me out?

ASSISTANT: Sure, please wait a moment. Sorry Parker, there is no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for contacting us, have a good day.