You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Owing an emergency, I would like to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, I am here to help you. May I know on whose name the ticket has been reserved formerly?

USER: My name is Alexander Parker.

ASSISTANT: Sorry Alexander Parker, there are no flights reserved on your given name formerly.

USER: Ok, no problem. Thank you for your information.

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