You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Christine Rodriguez. I want to book a flight ticket with price limit of 1000 for attending a client meeting in Detroit.

ASSISTANT: Ok, may I know your source and destination airport codes?

USER: My source and destination airport codes are DC-DCA, MI-DTW.

ASSISTANT: Ok, Is there any connection limit?

USER: My departure day is 03/04, return day is 03/06. And connections limit is one.

ASSISTANT: Ok, please wait for sometime.

USER: Ok.

ASSISTANT: Sorry for inconvenience, we did not find any flights based on your specified details.

USER: Ok, thanks for your service.

ASSISTANT: Thank you for contacting us.