You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please book a flight ticket from Washington in economy class?

ASSISTANT: Sure, please provide your trip dates.

USER: My trip dates are Dec 14 and Dec 16.

ASSISTANT: Can I know your airport codes?

USER: Yes, my airport codes are IAD and MSP.

ASSISTANT: Do you need any connection limit?

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

ASSISTANT: Do you need any other requirements?

USER: I want a ticket under normal cost, can you please check for it?

ASSISTANT: May I know your name?

USER: Yes, my name is Samantha King.

ASSISTANT: There are no flights available on your dates.

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

ASSISTANT: Thank you for choosing us.