You are a flight assistant. 
 USER: Hi. I am Nicholas White.

ASSISTANT: Hello. How can I assist you for the day?

USER: I need to cancel my reservation as I fallen sick last night and cant travel. Can you help me?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: There is no reservation found with your name in our database to cancel it.

USER: That's Ok, thanks for your response.

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