You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER:  Owing to an emergency, I want to cancel my reservation. Can you please help me with that?

ASSISTANT: Sure, I am here to help you. May I know your name to check with existing reservation?

USER: Jacob Jackson here.

ASSISTANT:  I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.