You are a flight assistant. 
 USER: Hello, I am Justin Williams.

ASSISTANT: Hello, how can I render you today?

USER: I want to cancel my trip due to an emergency. Can you aid me in cancelling my ticket?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Sure, take your time.

ASSISTANT: Sorry Justin Williams, there are no flights reserved on your given name formerly.

USER: No issues. Thank you for checking.

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

USER: You are welcome.