You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I be a help for you?

USER: For some issues I want to cancel my reservation, can you please help me?

ASSISTANT: Yes, may I know on which name the ticket was booked previously?

USER: Myself Margaret Miller.

ASSISTANT: Ok Margaret, please wait for a while. Sorry, there is no reservation found with your name.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you, have a nice day.