You are a flight assistant. 
 USER: Hello, I am Emma Parker.

ASSISTANT: Hello, how may I render you today?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, please wait I will check the reservation status on your name and get back to you.

USER: OK.

ASSISTANT: Sorry, we are unable to find a reservation on your name in the database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.