You are a flight assistant. 
 USER: Hi, I am David Evans.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket on 05/29 and return on 05/31, can you help me with booking please?

ASSISTANT: Sure, may I know your source and destination?

USER: My airport codes are New York, NY-EWR and Dallas & Fort Worth, TX-DFW.

ASSISTANT: Do you want connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: We found a Spirit airline, flight number: 1023, price: 200 with one connection.

USER: Please proceed with booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.