You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I support you?

USER: Due to sudden health issue, I would like to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, we are glad to help you. Can you please let me know your good name to proceed further?

USER: Thank you for accepting my request. I have reserved my ticket on the name of Thomas Lopez.

ASSISTANT: Sorry, we did not find any active reservation on your name in our records.

USER: Oh! I think the ticket was not booked properly while I am booking. Thank you for checking.

ASSISTANT: Thank you for choosing us.