You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am Lisa Evans want to book a flight ticket on 05/04 and return ticket on 05/06, so can you please help me with booking?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your airport codes?

USER: Yes, my airport codes are TX-HOU and NC-CLT.

ASSISTANT: Do you want a connecting flight or a direct flight?

USER: I need a connecting flight.

ASSISTANT: There is a flight 1020 in Southwest airline and price 100 with a connection. Shall I proceed?

USER: Yes, please.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.