You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, may I know your name please?

USER: My name is Helen Carter.

ASSISTANT: May I know your planned travelling dates please?

USER: My travelling dates are Mar 21 and 23.

ASSISTANT: May I know your airline preference please?

USER: I am fine with any airlines.

ASSISTANT: May I know your connection limit please?

USER: I prefer connecting flight.

ASSISTANT: May I know your preferable time for journey?

USER: I want to return at morning flight.

ASSISTANT: There is a connecting flight of fare 500 with business class in Spirit airline, shall I proceed for booking?

USER: Proceed with booking.

ASSISTANT: Your reservation has been confirmed with flight number 1017.

USER: Thank you.

ASSISTANT: You are welcome.