You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Anthony Thomas. My exam got postponed to next month, can you please cancel my last reservation? Please help me out.

ASSISTANT: Give me a moment, let me check your details.

USER: Sure, take your time.

ASSISTANT: Sorry, I didn't found any reservation basis on your details.

USER: Ok. Anyway, thank you for your service.

ASSISTANT: Thank you for contacting us.