You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Nicholas Evans here. I want to attend a seminar on machine learning with my cousin, could you book my ticket from IAD to HOU?

ASSISTANT: Your travelling dates please?

USER: My trip dates are Jan 20 and Jan 22.

ASSISTANT: Do you have any specifications?

USER: I want to return from HOU in the afternoon.

ASSISTANT: You need connection flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Here is a connecting flight with flight number 1021 and fare is 1000, providing ticket in economy class. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Your booking is done in Frontier airlines.

USER: Thank you.

ASSISTANT: Thank you for choosing us.