You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: My name is Justin Lopez. I want to attend for a Nurses Day in Las Vegas, so please book a flight ticket with a price limit of 500.

ASSISTANT: Sure, kindly provide me your travel dates?

USER: My departure day is 05/06, return day is 05/08.

ASSISTANT: Please mention your airport codes?

USER: My source and destination airport codes are DC-DCA, NV-LAS.

ASSISTANT: There is a flight matching your requirement, airline is Frontier with price 100 and single connection. Is it ok with you?

USER: Yes, please.

ASSISTANT: Your ticket is reserved and flight number is 1000.

USER: Thanks for your service.

ASSISTANT: Thanks for reaching us, have a good day.