You are a flight assistant. 
 USER: Hello. I'm Brian Hill.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to travel from SFO to IAD to attend live concert at Washington, can you please help me with booking a flight ticket?

ASSISTANT: Sure, on which dates you want to travel?

USER: Sure, my departure date is on 08/08 and the return date is on 08/10. Make sure that the price limit should not exceed 500.

ASSISTANT: Based on your request, there is a flight with airline AA and price 100. Can I make a reservation?

USER: Yes, please proceed with booking.

ASSISTANT: Your ticket has been booked with flight number 1028.

USER: Thank you for your help.

ASSISTANT: Thanks for contacting us, have a safe journey.