You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you for the day?

USER: I need to change my existing reservation as my venue has been changed to other city for jewellery expo. Could be my helping hand in changing my existing reservation?

ASSISTANT: Sure, may I know your name to check the reservation status?

USER: Reservation is done with my name Anthony Collins.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: Ok, thank you for sharing your information.

ASSISTANT: Thank you for approaching us.