You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Shirley White here.

ASSISTANT: How can I aid you?

USER: Can you book a direct flight to Washington for my family vacation? The price limit is less than 5000.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My preferable dates for travel are 08/11 to 08/13.

ASSISTANT: Please provide me the planned airport codes to check for the flight availability.

USER: My airport codes for boarding the flight are SFO to DCA.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Thank you.

ASSISTANT: Here, there is a connecting flight is available in your route under your price limit. Shall I proceed in booking?

USER: I am happy with the cost of the flight ticket as well. So you can proceed.

ASSISTANT: Your ticket has been confirmed for the flight 1006 in UA airlines.

USER: Thank you.

ASSISTANT: Thank you for reaching us.