You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have planned to visit mountain park in Denver but I am not feeling well to complete my trip.So can you please cancel my existing reservation?

ASSISTANT: Please, may I know your name?

USER: I have reserved my ticket on name Frank Wilson.

ASSISTANT: Sure, I will help you that, give me a minute, I will get back with your details.

USER: Ok sure.

ASSISTANT: I am sorry to say that there is no reservation found on your name.

USER: Ok, fine not an issue.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.

ASSISTANT: You are most welcome.