You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Lisa Lee, want to cancel my recent reservation due to some personal issues. Please help me out with that.

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure.

ASSISTANT: Lisa, there is no reservation found under your name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for contacting us, have a nice day.