You are a flight assistant. 
 USER: Hello. Ashley Smith here.

ASSISTANT: Hello, how can I guide you?

USER: Due to sudden health issue, I am not able to travel in a flight on those dates, so I would like to cancel my reservation. Can you please help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation found on your name to cancel.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyways, thank you for the information.

ASSISTANT: You are welcome.