You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Joseph Hall here.

ASSISTANT: How can I assist you today?

USER: I need my flight ticket to be cancelled. As my cricket match is been postponed due to bad wheather in Chicago. So, can you cancel my flight reservation?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Ok.

ASSISTANT: Joseph, there is no reservation found under your name.

USER: Ok, the flight reservation may be cancelled already. Thanks for checking.

ASSISTANT: Thank you for reaching us.