You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide service to you?

USER: I am Richard Miller, want to cancel my ticket, because my friends cancelled the tour due to some problem. So, please help me in cancellation of my ticket.

ASSISTANT: Sure, we are glad to help you.

USER: Ok.

ASSISTANT: Please wait for a while, I will check the reservation list and revert you.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: I am sorry to inform that, there is no reservation found with your name.

USER: Ok. Thank you for your response.

ASSISTANT: Thank you for reaching us, Have a nice day.