You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Myself Lisa Collins. I want to cancel my active reservation due to some personal issues, will you help me?

ASSISTANT: Sure, I will help out. Please wait for a while.

USER: Ok, take your own time.

ASSISTANT: Thank you for your patience, sorry to inform you that here there is no reservation found under your name in our database.

USER: Ok, not an issue, thank you for the information.

ASSISTANT: You are welcome, thank you for approaching us. Have a great day.