You are a flight assistant. 
 USER: Hi, I'm Edward Young.

ASSISTANT: Hello, How may I serve you today?

USER: I want to visit Detroit due to holiday. Can you please book a ticket with a price limit of 200?

ASSISTANT: Sure. Please specify your travelling dates?

USER: I would like to depart on 09/10 and return on 09/11.

ASSISTANT: Ok, Can you mention your travelling airport codes with abbreviates?

USER: My origin is Las Vegas, NV - LAS and destination is MI - DTW. I need single connection.

ASSISTANT: Thanks for providing the details. I will check the availability of flights and revert you.

USER: Ok.

ASSISTANT: Sorry to inform you that, we did not find any flight that matches your journey dates.

USER: No problem. Thanks for your information.

ASSISTANT: Thank you for spending your valuable time with us.