You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Please cancel my recent reservation, due to some health issue.

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: Sure, I am Joshua Williams.

ASSISTANT: Thank you. Joshua Williams, I am really sorry to inform you that there is no reservation done on your name.

USER: Ok, that's not a problem. Thank you.

ASSISTANT: Thank you for reaching us. Have a great time.