You are a flight assistant. 
 USER: Hi, I am Emily Lopez.

ASSISTANT: Hello, how may I help you today?

USER: Owing to an emergency, my business conference got postponed. So I want you to change my existing reservation.

ASSISTANT: Sure, Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found on your name in our database.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your assistance.