You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a plane from IAD to attend my nephew birthday celebrations, can you help me to book a plane under the price of 200?

ASSISTANT: Sure, May I know your travel dates?

USER: I want to leave on 03/22 and return on 03/24.

ASSISTANT: Please share me your destination.

USER: My destination is to MN - MSP.

ASSISTANT: Sorry for the inconvenience, there are no flights found on your requested dates.

USER: Ok, no issues.

ASSISTANT: Can I have your name please?

USER: I am Kevin Lee.

ASSISTANT: Have a nice day.

USER: Thanks for the information.