You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Joshua Rodriguez, planning to visit San Francisco. Can you please book me a ticket from Washington?

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

USER: My planned dates of journey are from 02/11 to 02/13.

ASSISTANT: Can you please share your airport codes?

USER: My nearest airport codes of travelling are from IAD to SFO.

ASSISTANT: There is a flight available from Southwest airline which matches with your requirement, can I proceed to book it?

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket is booked with flight 1001.

USER: Thank you for booking my ticket.

ASSISTANT: You are welcome.