You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My final exams are postponed.Can you please help me for changing the existing reservation?

ASSISTANT: Please provide your name.

USER: Sure, I'm Carolyn Anderson.

ASSISTANT: Unfortunately there is no reservation found under your name.

USER: OK, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.Have a great day.