You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for  the day?

USER: I met with an accident yesterday, so I could not reach my meting place. Will you aid me in cancelling my reservation?

ASSISTANT: Sure, we will help you.

USER: Thanks.

ASSISTANT: Could you please provide your name to check your reservation status?

USER: Sure, my name is Frank Allen.

ASSISTANT: Ok, please hold on.

USER: Sure.

ASSISTANT: Sorry to notify that, we couldn't find any reservation with your name.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for choosing us.