You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: I need to cancel my reservation for a client meeting but I have got a sudden call from my friend that one of my friend got met with an accident so I feel to cancel my reservation. Can you please help me out?

ASSISTANT: Sure, can you share your name please?

USER: Timothy Turner here.

ASSISTANT: Sorry, no reservation found on your given name in our database to cancel it.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for contacting us.