You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please tell me how can I guide you?

USER: I want to change my previous reservation, I have semester exams on those dates so my trip was postponed, can you please change my reservation?

ASSISTANT: Ok, sure can you please tell me your name?

USER: Sure, my name is Amanda Perez.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Perez, no reservation found on your name in my listing.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day.