You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid 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, I am glad to help you with that. For cancelling your reservation, we need to know your name. So, please send me your name to check your reservation status.

USER: Charles Martinez here.

ASSISTANT: Ok, please wait for a moment. I will check with it and get back to you soon.

USER: Ok.

ASSISTANT: Sorry to say that, we have not found any active reservation on your name in our database.

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

ASSISTANT: Thank you for choosing us.