You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I assist you to day?

USER: Myself Raymond Garcia. I need to change my reservation due to my planned event got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, take your time to check.

ASSISTANT: Sorry fro the trouble, there is no reservation on your name in our database.

USER: Oh! It may not be booked properly due to server issue. Thank you for your time.

ASSISTANT: Thank you for consulting us.