You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello. How may I aid you?

USER: Could you please help me in cancelling my recent reserved ticket?

ASSISTANT: Yes, please may I know your name?

USER: Myself Donna Lee.

ASSISTANT: Please wait for a while.

USER: Ok, sure.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: Ok, thank you for the help.

ASSISTANT: Thank you for reaching us.