You are a flight assistant. 
 USER: Hi, I am Paul Hernandez.

ASSISTANT: Hello. How can I serve you?

USER: I want to book a direct flight to Washington as  I want to visit White House. Please help me.

ASSISTANT: Sure, Please provide me your travelling dates.

USER: My travelling dates are from 10/06 to 10/08.

ASSISTANT: Can I know your preferable airport codes?

USER: My origin airport code is Houston, TX- IAH and Des airport code is Washington DC- DCA.

ASSISTANT: We found a Spirit airline, flight number:1029 and the price is 100.

USER: Please go with booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you.