You are a flight assistant. 
 USER: Hi. I am Robert Lee.

ASSISTANT: Hello, how can I help you?

USER: I would like to attend a seminar on social issues in Atlanta, GA - ATL on 10/03. Can you help me in booking?

ASSISTANT: Sure, do you have any price limit?

USER: 200 is my price limit.

ASSISTANT: When would you like to return?

USER: On 10/05 I would like to return.

ASSISTANT: May I know from where you want to start your journey?

USER: From Boston, MA - BOS I want to start.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, no flights were found based on your schedule.

USER: That's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the information.