You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to book a flight ticket from ORD to IAH?

ASSISTANT: Sure, help me with the trip dates?

USER: My travelling dates are Feb 20 to Feb 22.

ASSISTANT: May I know your name please?

USER: Andrew Garcia.

ASSISTANT: Do you have any preferences for this trip?

USER: I want to return in the afternoon.

ASSISTANT: We found an airline: Delta, flight number: 1011 and price is 300 with one connection which returns in the afternoon. Shall I proceed to book?

USER: You can proceed with booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.