You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I provide assistance to you?

USER:  I am Karen Nelson. I would like to change my existing reservation due to continued rainfall my baseball game has been postponed. Can you please help me for doing with that?

ASSISTANT: Sure, please hold on.

USER: Ok.

ASSISTANT: Thanks for being hold, there is no reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for availing us.