You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello. How can I help you?

USER: Please help me to book a flight ticket from LAX to IAH.

ASSISTANT: May I know your desired travel dates please?

USER: My travel dates are from Apr, 13 to Apr, 15.

ASSISTANT: Do you have any specifications?

USER: I need to return in the afternoon and I prefer a single connecting flight.

ASSISTANT: May I know your name please?

USER: Pamela Johnson.

ASSISTANT: There is a flight with connection limit 1 and fare 600, shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket is booked, flight number 1024 with United Airlines.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.