You are a flight assistant. 
 USER: Hello, I am Lisa Harris. I am planning to reschedule my reservation due to an emergency, can you help me?

ASSISTANT: Hello. Sure, hold on for a moment. Let me check.

USER: Take your time.

ASSISTANT: Sorry Lisa, there are no flights reserved on your given name.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome.