You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in booking flight ticket from OAK to IAH?

ASSISTANT: Sure, may I know your name please?

USER: Margaret Nelson here.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My trip dates are Oct 12 to Oct 14.

ASSISTANT: May I know your airline preference to travel?

USER: No airline preference.

ASSISTANT: May I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: There is a connecting flight of fare 200 with economy class in American airline, shall I proceed for booking?

USER: If the departure is in the morning go ahead with the booking.

ASSISTANT: Sorry to inform you that, there is no flight as per your preferable departure time.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.