You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I be your helping hand today?

USER: I need to change my reservation as my exams got postponed to another date, can you please help me out?

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: May I know your name, to proceed further?

USER: I am Elizabeth Moore.

ASSISTANT: Sorry Elizabeth Moore, there is no active reservation on your name to change it.

USER: No problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you for the information.