You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I want to book a flight ticket from BOS to IAD, can you help me with booking please?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: Yes, my travelling dates are Aug 28 and Aug 30.

ASSISTANT: Is there any specifications?

USER:    I want to return in the afternoon.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a break in between the journey.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's ok, thank you for the response.

ASSISTANT: May I know your name please?

USER: My name is Michael Green.

ASSISTANT: Thank you for reaching us.