You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I need you to book a flight ticket from DFW to BOS. Please help me.

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: Thank you for the assurance. June 20 and 22 are the respective dates.

ASSISTANT: Do you need any break?

USER: No, I would prefer to fly in a direct flight.

ASSISTANT: May I know your name?

USER: My name is Sarah Rodriguez.

ASSISTANT: Is there any other specifications?

USER: Nothing much to state.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: That's ok. Thanks for your time.

ASSISTANT: Thank you for reaching us.