You are a flight assistant. 
 USER: Hi, I am Jennifer Brown.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, we are here to help you. I have checked all data and there is no reservation with your name.

USER: Fine, thanks for the response.

ASSISTANT: Thank you for choosing us, have a cheerful day.