You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephen Mitchell from Washington.

ASSISTANT: How may I aid you today?

USER: Can you please check is there any flight available in the route Washington to Los Angeles?

ASSISTANT: Sure, may I know your travelling airport codes?

USER: The preferred airport codes are DCA and LAX.

ASSISTANT: Please mention your journey dates?

USER: The travelling dates are 10/19 and 10/21.

ASSISTANT: Please hold a moment.

USER: Ok.

ASSISTANT: There is a flight with one connection and the price is 100, can I proceed with the booking?

USER: I am fine with this flight to travel, please proceed with the ticket booking.

ASSISTANT: Your ticket has been reserved with the flight number 1028 in Delta airlines.

USER: Thank you for your help in booking the flight ticket.

ASSISTANT: Thank you for reaching our service.

USER: You are welcome.