You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to visit Boston BOS from DFW. Can you find a flight ticket for me?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Thank you. My planned trip dates are on Aug 25 and return Aug 27.

ASSISTANT: Can you please share your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: Yes, I want to a normal cost.

ASSISTANT: May I know your name please?

USER: Yes, I am Robert Carter.

ASSISTANT: Robert Carter, there are no flights available in your route.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.