You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you please help me out with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your good name to check the previous reservation?

USER: Sure, I have reserved it on the name of Katherine Taylor.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for your precious time.

USER: It's alright.

ASSISTANT: Sorry to say this, there is no active reservation found on your name in the airline database.

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

ASSISTANT: Thank you for choosing us, have a good day.

USER: Welcome.