You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Benjamin Jackson, I need to amend my reservation which I have done last week as my exams got postponed.

ASSISTANT: Sure, I will help you with that. Please be on hold.

USER: Thank you for considering my request.

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

USER: It's ok, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.