You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. I hope you are good today, how can I help you?

USER: Unfortunately, I want to cancel my recently done reservation due to some problem. Can you please help me in this intent?

ASSISTANT: I will help you, please may I know on whose name did you booked the ticket?

USER: Sure, myself David Gonzalez here.

ASSISTANT: Wait a while please.

USER: Sure.

ASSISTANT: There is no reservation found on your name, David Gonzalez.

USER: Ok, no issues.

ASSISTANT: Do you want to know anything else?

USER: No I don't need if I want I will inform your service.

ASSISTANT: Thanks for utilizing our services.

USER: Welcome.