You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Benjamin Johnson.

ASSISTANT: How may I aid you today?

USER: Can you help me to book a flight on 03/21 and 03/23?

ASSISTANT: Sure, I will help you in booking, can you share your travelling dates? May I know your airport codes?

USER: My source and destination airport codes are DFW and MCO.

ASSISTANT: I found a flight for you that UA airline is providing flight with 0 connection.

USER: I need a connecting flight.

ASSISTANT: Sorry, no connecting flights.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your time.