You are a flight assistant. 
 USER: Hello, I am Joseph Carter.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my ticket due to the bad weather condition, can you help me to cancel my ticket?

ASSISTANT: Sure, hold on for a moment.

USER: Take your time.

ASSISTANT: Sorry Carter, there are no flights reserved under your name.

USER: No issues, I think it may have been cancelled by my colleague. Thank you for checking.

ASSISTANT: Welcome.

USER: You are welcome.

ASSISTANT: Thank you for choosing us.