You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Owing to an emergency, I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: May I know your name please to proceed further?

USER: Myself Shirley Scott.

ASSISTANT: Shirley Scott sorry, no reservation found on your name in our database.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.