You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My funfair show has been postponed. I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, please share your name to change your existing reservation?

USER: Thomas Parker.

ASSISTANT: Sorry to inform you that there were no reservation found with given name.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching our agency, have a good day.