Hello, I am Anna Thompson.
user
Hello. How can I aid you?
assistant
My baseball tournament has been preponed. I would like to change my existing reservation. Could you please help me with changing?
user
Sure, please wait.
assistant
Ok.
user
 Sorry, there were no flights available on your requested dates.
assistant
Ok, no issues. Thank you for your kind information.
user
 Thank you for availing us.
assistant