You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Jessica Allen. I need to change my reservation as my planned trip got postponed. So please help me with changing my reservation.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a moment I will check the reservation list.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no active reservation on your name.

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

ASSISTANT: Thank you.

USER: Most welcome.