You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER:  I am Justin Perez want to cancel my reservation owing an emergency. Can you help me in cancelling?

ASSISTANT: Sure, I am here to help you. Please wait for a few minutes.

USER: Ok.

ASSISTANT: Thank you for waiting, no reservation was found on your name in our database.

USER:  Thank you for your help.

ASSISTANT: Thank you for choosing us.