You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please to check your reservation status?

USER: Pamela White here.

ASSISTANT: Pamela White, no reservation has been found on your name in our database.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for choosing us.