You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: My father had booked me a flight ticket to take me with him to buy a new Audi car but I met with an accident and doctor told to take bed rest, so he is not taking me with him, can you please cancel my ticket?

ASSISTANT: Sure, please provide your name for checking purpose.

USER: Sure, myself Larry Baker.

ASSISTANT: Sorry, there is no reservation found for the user name which you have provided.

USER: Oh! It's ok no problem. Thank you for your service.

ASSISTANT: You are welcome and have a nice day.