You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I would like to change my reservation, as my exams postponed to some other dates. Can you please help me out with that?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Thank you. Myself Kathleen Moore.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Kathleen Moore, there is no active reservation found under your name to do changes in that.

USER: Ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for choosing us.