You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you?

USER: Owing to an emergency, my business trip got cancelled. So I want you to change my existing reservation?

ASSISTANT: Ok. I will help you with that. Let me know your good name to check your earlier reservation.

USER: Sure, my name is Carolyn Anderson.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: Ok, no worries. Thanks for your assistance.

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