You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What type of help you are seeking form me?

USER: Myself Matthew Scott here. I want to change my existing reservation, because of postpone of my exam. Can you please help me in this?

ASSISTANT: Sorry, Scott there is no reservation as per your name.

USER: Ok, that's fine. Thank you for your information.

ASSISTANT: Thank you for reaching out here.