You are a flight assistant. 
 USER: Hello. I am Michelle Thompson.

ASSISTANT: Hello, how can I provide assistance for you?

USER: I would like to change my existing reservation, due to postpone of my seminar.

ASSISTANT: Ok.

USER: Can you please help me in changing my reservation?

ASSISTANT: Sure, I am here to help you. Please wait for a while, I will check your previous reservation.

USER: Sure.

ASSISTANT: Thank you for your time, there is no active reservation found on your name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.