You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from HOU to IAD. Could you book a ticket?

ASSISTANT: Sure, we are happy to help you. Can you please let me know your travelling dates?

USER: Departure is by Mar, 19 and return date is Mar, 21.

ASSISTANT: Do you prefer any break in between journey?

USER: I would prefer connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: I prefer normal-cost airlines.

ASSISTANT: May I know your good name?

USER: I am Samuel King.

ASSISTANT: Delta Airlines is providing connecting flight with the ticket fare of 300 and depart time is 3:00 hours, arrival time is 7:00 hours. Shall I proceed?

USER: Please book a flight.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1028.

USER: Thank you.

ASSISTANT: Thank you for choosing us.