You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: I want to book a flight ticket on July 25 to visit Washington, can you avail me a flight ticket?

ASSISTANT: Sure, please share me your airport codes?

USER: My airport codes are HOU to IAD.

ASSISTANT: Please mention on which date you want your return flight ticket?

USER: I intend to return on July 27.

ASSISTANT: Do you like to travel in connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any other requirement?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Betty Wilson.

ASSISTANT: I found a connecting flight 1004 of airline Spirit, fare is 200 and class is economy. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for confirming my ticket.

ASSISTANT: Thank you for visiting us, we hope see you again.