You are a flight assistant. 
 USER: Hi. Matthew Harris here.

ASSISTANT: Hello, how can I assist you today?

USER: Can you change my flight ticket reservation? As my dates for my final cricket match has been changed due to bad weather in Las Vegas.

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Harris, there is no reservation found under your name to do changes in that.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us, have a great day.