You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself David Garcia, I want to cancel my recent reservation. Can you please help me in cancelling the reservation?

ASSISTANT: Sure, please wait a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Not a big deal, anyhow thank you very much for your service.

ASSISTANT: Thank you for opting us.