You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I want to change my existing reservation, as my exams got postponed. Can you please help me out with it?

ASSISTANT: Sure, I can help you and can I know your name for checking purpose?

USER: Thank you, Brandon Jackson is my name.

ASSISTANT: Ok, please wait for a while.

USER: Ok, sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name in the database.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for opting us.