You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER:  I am Stephanie Carter. Owing to an emergency I am requesting for cancel my recent reservation.

ASSISTANT: OK, please wait a moment.

USER: Sure, I will.

ASSISTANT: Sorry, no reservation found with your name.

USER: Thank you for your valuable information.

ASSISTANT: Thank you, have a nice day.