You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your concern?

USER: I am Kenneth Evans have to attend a business meeting at Washington, can you help me to book a direct flight?

ASSISTANT: Ok, may I know the travel dates to book?

USER: Sure, my travelling dates will be 07/29 and 07/31.

ASSISTANT: Ok, may I know your airport codes you prefer to make the journey?

USER: Ok, I want to fly from SFO to IAD.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: There is a flight available with 1 connection limit and the airfare is 200. May I book the flight 1004?

USER: Yes, you can book my ticket.

ASSISTANT: Ok, the flight ticket is booked and the airlines is Frontier.

USER: Thank you.