You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a ticket from Detroit, MI-DTW to Washington DC-DCA.

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: Departure date is 11/23 and will return by 11/25.

ASSISTANT: May I know your name please?

USER: I am Alexander Smith.

ASSISTANT: Do you have any specifications?

USER: Price limit is 1000. Connections limit is 1.

ASSISTANT: Please wait for a minute.

USER: Sure.

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

USER: Thanks.

ASSISTANT: Thank you for reaching us.