You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to attend a Seminar at BOS, can you help me with booking from ORD?

ASSISTANT: Sure, I am glad to help you. May I know your travel dates?

USER: My travel dates are June 02 and June 04.

ASSISTANT: Noted. May I know your name?

USER: I am Karen Lewis.

ASSISTANT: Thank you. Do you prefer for a direct flight or a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other concerns?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: Ok, no issues. Thank you.

ASSISTANT: You are most welcome.