You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: In the last month I have reserved a flight on my name to travel to Detroit to celebrate my father birthday but suddenly there is an examination on the same date our college management has informed suddenly to us. So I will travel to my home on some other dates. Can you please help me in changing my flight ticket booking?

ASSISTANT: Sure, I am here to help you. May I know your name to check with the status?

USER: Thank you for your concern. My name is Emily Phillips.

ASSISTANT: Emily Phillips, regret to inform that there is no active reservation found under your name to amend.

USER: Oh! It might not booked properly at the time of booking. Anyways thank you for the information.

ASSISTANT: Thank you for reaching our agency.