You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I need to cancel my recent reservation as I met with an accident and my leg got fracture and I am unable to travel. Can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Could you please provide your name for checking the present status?

USER: Sure, my name is Mark Williams.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry Mark Williams, no reservation done on your name previously.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for approaching us, have a nice day.