You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking the flight ticket from LAS to IAD?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are Oct 19 and Oct 21.

ASSISTANT: Do you have any specifications?

USER: I would like to return in the evening.

ASSISTANT: Is there any class preferences?

USER: I am comfortable with any class.

ASSISTANT: We found a flight in Frontier airlines, flight number is 1021 with single connection and price is 300 economy class. Shall I proceed?

USER: Please proceed.

ASSISTANT: May I know your good name?

USER: My name is Carol Hall.

ASSISTANT: Your ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.