You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have booked a flight ticket yesterday under the name of Robert Lee. Can you please cancel that ticket?

ASSISTANT: Ok, wait a moment I will check your status of reservation to cancel it.

USER: Nice to hear that, I will wait for your response.

ASSISTANT: Thanks for your time, there is no reservation found with your name to cancel it.

USER: That's ok, thanks for checking and for your immediate response.

ASSISTANT: Ok, thanks for consulting us.