You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Frank Carter.

ASSISTANT: How can I help you today?

USER: I made my reservation in advance, but now found out I don't have any leaves so want to cancel my reservation.Please help me to cancel it.

ASSISTANT: Sure, I'll help you in cancellation.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the reservation list.

USER: OK.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no reservation found by your name.

USER: That's Fine. Thank you.

ASSISTANT: Thank you for opting us.