You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Myself Michelle Johnson. As I changed my plans in business trip, I want to change my existing reservation.

ASSISTANT: Sure Johnson, give me a moment.

USER: Sure.

ASSISTANT: There is no reservation on your name, Michelle.

USER: Thank you for the information.

ASSISTANT: Thanks for reaching us.