You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Kenneth Evans, can you help me to search a flight with 500 price limit?

ASSISTANT: Sure, where do you want to have your journey?

USER: My preferable airport codes are IAD and SEA.

ASSISTANT: Ok, may I know your travelling dates to proceed further?

USER: I would like to travel on 05/27 and 05/29.

ASSISTANT: Ok, there is a flight 1003 in Delta airline matching your details with price 100. Shall I proceed?

USER: Yes, proceed with booking.

ASSISTANT: Ok, your booking is done.

USER: Thank you.

ASSISTANT: You are welcome, have a nice journey.