You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Robert Thomas. I am looking for a direct flight, within the fare 200. Can you help me to provide a ticket?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates are 04/23 and return on 04/25.

ASSISTANT: Ok, can I know your airport codes?

USER: My airport codes are IAD and HOU.

ASSISTANT: I found a flight 1016 of Hawaiian. airlines matches with your preferences, can I proceed?

USER: You can proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you so much.

ASSISTANT: Thank you, have a good day.