You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in changing my recent reservation? As my planned trip has been postponed to some other dates.

ASSISTANT: Sure, I can help you. May I know your name?

USER: Thank you for accepting my request, I had reserved it on the name of Larry Thompson.

ASSISTANT: Thank you. Please wait, let me check your reservation status.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: Oh! I think the ticket was not booked due to server issue.

ASSISTANT: You are welcome and thank you for choosing us.

USER: Anyway, thank you for the information.