You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Raymond Lewis. Please book a flight ticket in economy class from AUS to IAH.

ASSISTANT: Sure Lewis, could you please share me with your dates of travel?

USER: My travelling dates are 11/21 and 11/23.

ASSISTANT: May I know your airline preference please?

USER: I am ok with any airline.

ASSISTANT: Do you need any class preference?

USER: I have mentioned above.

ASSISTANT: There is a flight with the connecting flight of fare 100, are you ok with this booking?

USER: Yes, please proceed further.

ASSISTANT: Ok, your booking is done with the flight number 1015 of Frontier airline.

USER: Thank you.

ASSISTANT: You are welcome, have a safe flight.