You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Lisa Perez. Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Sure, please wait for a while.

USER: Ok, thank you for your response.

ASSISTANT: Sorry Lisa, there is no active reservation found with your name in our records.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: My pleasure.