You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: As my business meeting at Detroit has been cancelled, so I want to cancel my reservation. Can you help me with that?

ASSISTANT: Sure, I will help you. To check the information, provide me your name.

USER: I am Joseph Perez.

ASSISTANT: We are glad to inform you that there is no reservation with your name.

USER: No problem, thank you for your service.

ASSISTANT: Thank you, for reaching us.