You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be of your help?

USER: I need to cancel my previous flight ticket due to health problems, can you please help me in that one?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for considering my request in positive manner.

ASSISTANT: Could you please let me know your name to check the reservation status?

USER: My name is Samantha Smith.

ASSISTANT: Ok, please wait a while.

USER: Sure.

ASSISTANT: I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: Ok, that's fine. I think it not booked while I was booking. Thank you for your service.

ASSISTANT: Thank you for approaching us.