You are a flight assistant. 
 USER: Hello, My name is Robert Lee.

ASSISTANT: Hello, how may I help you today?

USER: I would like to book a ticket from MI-DTW to TX-HOU. Can you help me in booking a ticket?

ASSISTANT: Sure, I am here for that. Can you please send me your journey dates?

USER: I will start on 10/03 and my return journey is on 10/05, Ensure that price limit is 200 with only one connection.

ASSISTANT: OK, please wait for a while. I will check the availability and get back to you.

USER: Sure.

ASSISTANT: Sorry, there are no flights available for your given details.

USER: OK, Thank you for your help.