You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I serve you today?

USER: Can you please aid me to modify the ticket details? Because the planned trip got postponed due to some other important work.

ASSISTANT: Sure, please share your good name?

USER: Ok, my name is Richard Davis.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation found with the given name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Ok, thank you.