You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Steven white, I want to book a flight from DFW to BOS to meet my friend. Can you book a connecting flight for me?

ASSISTANT: Sure, I am here to help. Please provide me your departure and arrival dates.

USER: I will fly on 25th June and return on 27th June.

ASSISTANT: Do you need any halt between your journey?

USER: Yes, I need a halt.

ASSISTANT: I am sorry to inform you that there are no flights available on given dates by you.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us, hope to serve you better next time.