You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Charles Allen here.

ASSISTANT: Charles, how can I assist you today?

USER: Yes, I am planning a round trip for my shopping. I need your help in booking my ticket.

ASSISTANT: Definitely, I can help you with that. Can you please share your preferable travel dates?

USER: Yes, this trip will be planned on 04/21 and my return will be on 04/23.

ASSISTANT: Could you please help me with the airport codes?

USER: My airport code is HOU.

ASSISTANT: Please allow me a moment to check for the availability of flight.

USER: Sure, take your time.

ASSISTANT: Charles, there is a flight available with price 100 and the connection is 1 with Hawaiian airline. Would you like me to proceed with the booking?

USER: That's perfectly matching with my requirements. Please proceed in booking my ticket.

ASSISTANT: Your booking is confirmed with 1003 flight number.

USER: Thank you for helping me out.

ASSISTANT: You are most welcome. Thank you for reaching us, have a great day.