You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: My name is Charles Miller. I would like to part in the sports event which is going to be held in Chalotte, NC-CLT on 04/26.

ASSISTANT: Sure, may I know further details?

USER: Sure, I am returning to Boston, MA-BOS on 04/28.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry to say that no flights were found with your details.

USER: Thank you for the information.

ASSISTANT: Thanks for connecting with us.