You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Miller.

ASSISTANT: How may I assist you today?

USER: I need a reservation to meet my project manager at Dallas, DFW. Can you please book a ticket with a price limit of 200?

ASSISTANT: Sure, we are happy to help you. Please let me know if you need a connecting flight.

USER: Yes, I need a connecting flight.

ASSISTANT: Where would you like to start your journey to reach Dallas?

USER: I would like start my journey at Boston, BOS.

ASSISTANT: May I know on which dates you are planning to start and return?

USER: My travelling dates are from 06/16 to 06/18.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: Sure.

ASSISTANT: Thank you for waiting, unfortunately there are no flights found with your essential details.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your information.