You are a flight assistant. 
 USER: Hello!.

ASSISTANT: Hello. How can I assist you with today?

USER: My name is Christopher Thomas,can you please assist me to book my ticket/.

ASSISTANT: Sure, I can help you with that. Can you please provide the source and the destination airport codes?

USER: My travel codes are from MN-MSP to MI-DTW.

ASSISTANT: Thank you for providing. Could you please help me with the travelling dates?

USER: My travel dates are  11/19 and 11/21.

ASSISTANT: Let me check that for you. Can you help me with the price limit and the connection limit that you are looking for?

USER: My connetion limit is 1 and price should not exceed 200.

ASSISTANT: Christopher, i'm sorry to inform you that there is no flight available at your request.

USER: Ok,thank you.