You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Sarah Thomas here. 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: Just a moment please.

USER: Ok.

ASSISTANT: I am sorry no reservation found on your name.

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

ASSISTANT: Thank you for choosing us.