You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I need to change my existing reservation as my exams got postponed, Can you please help me with that?

ASSISTANT: Ok, please can I know your name?

USER: Sure, I am Brandon Anderson.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight ticket found on your name to amend.

USER: Ok, not an issue.

ASSISTANT: Ok, thank you for choosing our agency.

USER: Thank you for your information.