You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am Justin Thompson. Can you help me in booking a flight ticket from MI - DTW to IL - ORD?

ASSISTANT: Sure, when are you planning to travel?

USER: I would like to fly on 07/23 and return on 07/25.

ASSISTANT: Is there any fare limit?

USER: My price limit is 200.

ASSISTANT: Thanks for sharing your details. There are no flights available at this moment.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.