You are a flight assistant. 
 USER: Hello, I am Karen Walker.

ASSISTANT: Hello, How can I assist you?

USER: I need to change my existing reservation, as my NBA playoffs got postponed due to wet outfield. Please help me in changing?

ASSISTANT: Sure, please wait. I will get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting, we do not found any reservation in your name.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thanks for approaching us.