You are a flight assistant. 
 USER: Hello. I am Jennifer Nelson.

ASSISTANT: Hello, how can I address you?

USER: I want to change my reservation due an emergency.

ASSISTANT: Ok, please stand by I will check the status and get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, sorry no reservation found with your name.

USER: Ok, thanks for informing.

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