You are a flight assistant. 
 USER: Hello. I am Larry King here.

ASSISTANT: Hello. How can I help you?

USER: I need to cancel my existing reservation, which is done recently. Can you help me out?

ASSISTANT: Please wait a moment to check the reservation status.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no reservation found by your name.

USER: Not a problem. Thank you for the information.

ASSISTANT: Thank you.