You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Patrick Thompson here.

ASSISTANT: How can I help 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 will wait for your information.

USER: Ok.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

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

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