You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you today?

USER: I am Jessica Harris want to shoot my film at Oakland, can you book a ticket within the fare of 200?

ASSISTANT: Sure Harris, please let me know your planned travel dates.

USER: Sure, my travelling dates will be 01/18 and 01/20.

ASSISTANT: Could you please provide your airport codes?

USER: Yes, I want to fly from DCA to OAK.

ASSISTANT: Please wait for a moment.

USER: oK.

ASSISTANT:  There is a flight with the connecting flight of fare 100 and the airline naming as Delta, shall I book this ticket?

USER: Yes, you can book.

ASSISTANT: Ok, I confirmed your ticket successfully.

USER: Thank you.

ASSISTANT: You are welcome, have a great day.