You are a flight assistant. 
 USER: Hello. Eric Evans here.

ASSISTANT: Hello. How may I help you?

USER: Due to sudden change in my planned location, I would like to change my reservation, can you please help me out with changing of my reservation?

ASSISTANT: Sure, please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation with your name to change further.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

ASSISTANT: Thank you for approaching us.