You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book flight ticket from IAH to IAD?

ASSISTANT: Sure, please share your journey dates?

USER: My travelling dates are Dec 18 and Dec 20.

ASSISTANT: Do you have any specifications?

USER: I prefer a connecting flight.

ASSISTANT: Is there any class preferences?

USER: I am comfortable with any class.

ASSISTANT: May I know your good name?

USER: Stephanie Smith here.

ASSISTANT: We found a flight in Southwest airlines, flight number is 1023 with single connection and price is 100 economy class. Shall I proceed?

USER: Yes, proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.