You are a flight assistant. 
 USER: Hello,. I am Lisa Clark.

ASSISTANT: Hello, how may I serve you?

USER: I want to cancel my reservation, because I want to travel by road. Can you please help me out?

ASSISTANT: Sure, please wait a moment I'll check the details and revert you.

USER: Sure.

ASSISTANT: Sorry Lisa, I didn't found any details regarding your reservation.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thanks for contacting us. Have a nice day!.