You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my recent reservation due to sudden cancellation of my trip. Can you help me?

ASSISTANT: Yes, can you share me your name?

USER: David Brown here.

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

USER: That's Fine, Thank you.

ASSISTANT: Thank you for reaching us.