You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Jacob Baker. Can you please help me in changing my existing reservation, as my football match got postponed to some other date.

ASSISTANT: Sure, I am here to help you. Please stand by.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.