You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Cynthia Green, I need to modify my reservation as my exams got postponed for some other day. Can you help me with that?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Cynthia Green, we haven't found any reservation under your name in our database.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.