You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Jeffrey Taylor. My football tournament has been postponed.I would like to change my existing reservation. Can you please help me with changing?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, no worries at all.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.