You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Kimberly Thomas. I want to go for round trip to Boston, MA - BOS, so help me in booking a flight ticket.

ASSISTANT: Sure, may I know your planned travel dates?

USER: I will star on 06/22, return on 06/24.

ASSISTANT: Do you need a halt in between your journey?

USER: I want a direct flight.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for opting us.