You are a flight assistant. 
 USER: Hello. Samuel Green here.

ASSISTANT: Hello Green, how can I help you today?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, I am happy to help you. Please wait for a while.

USER: Thank you, take your time.

ASSISTANT: Sorry Green, no reservation found under your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.