You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I have to change my reservation due to my trip dates got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, may I know your name?

USER: Thank you. Myself Patrick Lee.

ASSISTANT: Please stay online, let me check with the details and get back to you.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting.\.

USER: It's ok.

ASSISTANT: Sorry, there are no active reservations on your given name to change.

USER: Oh! It may not be booked properly due to server issues while booking. Anyway, thank you for your time.

ASSISTANT: It Might be, thank you for reaching our service.

USER: Most welcome.