You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Timothy Clark here. Suddenly my Swimming competition is cancelled.So I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you. Please wait a moment, I will check for the reservation with your name.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, I didn't find any reservation with your name our database.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us. You are welcome.