You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Carolyn Moore here.

ASSISTANT: How can I help you?

USER: Due to some reason, I have to stay back. Can you cancel my ticket?

ASSISTANT: Sure, I will help you. There is no reservation on your name in our database.

USER: It's ok. Thank you for your time.

ASSISTANT: Thank you for choosing us.