You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: The location of my interview was shifted last minute, can you please help me in modifying my existing reservation?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Thank you for accepting my request. I have reserved it on the name of Jeffrey Collins.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Jeffrey Collins, there is no active reservation found under your name to do modifications in that.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.