You are a flight assistant. 
 USER: Hello, I am Kevin Smith from Oakland.

ASSISTANT: Hello, how can I oblige you?

USER: I am planning to attend a Cultural Event in Washington, can you help me in booking a flight ticket within my price limit of 1000?

ASSISTANT: Sure, Kindly mention your travelling dates.

USER: I would like to fly on Dec 25 and return on Dec 27.

ASSISTANT: Ok, please provide your boarding and landing airport codes.

USER: My airport codes are OAK, DCA.

ASSISTANT: Ok, Do you prefer a direct flight or a connected flight?

USER: I need a single connection. Please check the return flight in afternoon.

ASSISTANT: Ok, Is there any class preferences?

USER: I am comfortable with any class.

ASSISTANT: Thank you for providing details, we found a connecting flight in 1005 Spirit plane with a fare of 100. Can I proceed for booking in economy class?

USER: You can proceed to booking.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for choosing us.