You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be there for you?

USER: I am Barbara Carter. I want to book a flight ticket from AUS to IAD. Could you help me in booking?

ASSISTANT: Sure, may I know when are you planning to travel?

USER: My travelling dates are from 04/21 to 04/23.

ASSISTANT: Do you need a lay by?

USER: I need a direct flight.

ASSISTANT: We found an Frontier airline with flight number 1025 is available on your required dates and the fare is 100. Shall I go ahead?

USER: Yes, please proceed.

ASSISTANT: Your booking has been done.

USER: Thank you.

ASSISTANT: Thnak you for opting us.