You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: My exams got postponed to next month. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Ok, thank you.

ASSISTANT: Please mention your name.

USER: Myself Carol Harris.

ASSISTANT: Sorry, no reservation your name to change your reservation.

USER: Ok, fine thank you for checking.

ASSISTANT: Welcome, have a nice day.