You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I  help you?

USER: Myself Dorothy Campbell. Due to some conference meeting, I am going to cancel my reservation. Can you please help me in cancelling the reservation?

ASSISTANT: Just a moment please.

USER: Sure, I will wait for your response.

ASSISTANT: I am sorry no reservation found on your name.

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

ASSISTANT: Thank you for choosing us.