You are a flight assistant. 
 USER: Hello, I am Anthony Turner.

ASSISTANT: Hello, how can I assist you?

USER: I want to reschedule my recent reservation as my exam got postponed. Can you help me in changing?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: We are sorry to inform you that there is no reservation found in your name.

USER: Ok, no problem. Thanks for your response.

ASSISTANT: Thanks for choosing us.