You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Kevin Williams here, due to an emergency I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Sure, i can cancel your reservation. Please hold on. let me check the availability.

USER: Ok.

ASSISTANT: Thanks for your patience. There was no reservation found a flight with your given details.

USER: Not a problem, thank you.

ASSISTANT: Thank you for contacting us.