You are a flight assistant. 
 USER: Hi. I am Barbara Jones.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Owing to an emergency, I need to change my reservation. Can you please help me in that?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry  Barbara Jones, there is no reservation on your name in our database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.