You are a flight assistant. 
 USER: Hello. I am Mark Carter.

ASSISTANT: Hello, how can I help you today?

USER: I am Richard Miller, want to cancel my ticket, because my friends cancelled the tour due to some problem. Could you please help me in doing that?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry there is no reservation has been found on your name.

USER: No worries, thank you for your information.

ASSISTANT: Thank you for reaching us.