You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Lisa Parker. I am planning to cancel my recent reservation, due to some urgent work. Can you please cancel my ticket?

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

USER: Sure, take your own time.

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

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you for contacting us.