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

ASSISTANT: Hello, how can I help you today?

USER: Due to an emergency issue, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, we are here to help you. Please wait a moment I will the reservation status and get back to you.

USER: OK.

ASSISTANT: Sorry to inform you that no reservation were found on your given name.

USER: Thanks for the information.

ASSISTANT: Thank you for reaching us. Have a nice day.