You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Robert Lee. I want to make some changes in my recent booking due to semester exams on that dates, can you please help me in that changing my recent booking?

ASSISTANT: Sure, I am here to help you. Please wait a moment, let me check your status of reservation.

USER: Sure.

ASSISTANT: Actually, I couldn't find any reservation under your name.

USER: No problem, thank you for your quick hand help.

ASSISTANT: Welcome, have a good day.