You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service you are seeking from our agency?

USER: I need to change my reservation due to my planned trip got postponed so please help me with that.

ASSISTANT: Sure, I am oblige to help you. Can you please provide your name to check your previous reservation?

USER: Sure, please check the reservation with my name Gregory Miller.

ASSISTANT: Ok, please be on hold to check.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there is no reservation found with your name in our records.

USER: Oh! It may not be booked properly due to server issue.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Anyway, thank you for your time.