You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: My name is Jessica Walker, I want to book a flight ticket with price limit of 500.

ASSISTANT: Sure, May I know your travelling dates?

USER: My departure day is 07/13, return day is 07/15.

ASSISTANT: Please share your airport codes.

USER: I want to attend for my family function in Las Vegas, NV-LAS from MI-DTW. And my connections limit is one.

ASSISTANT: Unfortunately, There is no flight available with your details.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for choosing us.