You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be of your assistance?

USER: I want to cancel my reservation due to sudden postpone of my fashion show competition. So, please help me in that.

ASSISTANT: Sure, we can help you. Please share me your name to check your details.

USER: Thank you. You can check the reservation list with name, Dorothy Robinson.

ASSISTANT: Ok, let me check your details and revert to you with the current status.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name to proceed further.

USER: Ok. Thank you.

ASSISTANT: Thank you for choosing our service.