You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at this moment?

USER: I'm Dorothy Johnson.

ASSISTANT: Ok.

USER: As I am really frustrated with your services, one of your agent had booked a wrong flight for me. I am looking for cancellation. Can you help me out?

ASSISTANT: Ok, sorry for the inconvenience.I'll help you out .

USER: That's good.

ASSISTANT: Sorry, no reservation found on your name.May you have connected with another agency.

USER: That's ok.

ASSISTANT: Thank you for contacting us.

USER: Anyways, thank you.