You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your service?

USER: My name is Michelle Thompson. I want to attend for a bike racing in Dallas & Fort Worth, so please book a flight ticket with a single connection.

ASSISTANT: Ok. May I know when you are willing to travel?

USER: My departure day is 08/13, return day is 08/15.

ASSISTANT: Is there any price limit you need?

USER: My price limit is 500.

ASSISTANT: Can you provide me your airport code to proceed?

USER: My source and destination airport codes are CA-OAK, TX-DFW.

ASSISTANT: Thanks for providing your details. We did not find any flights available at this moment matching your particulars.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for choosing us.