You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Gary Parker here.

ASSISTANT: How can I assist you today?

USER: I want to travel for a round trip from DCA to DCA, can you please help me with that?

ASSISTANT: Sure, can you please share your travel dates?

USER: The travel dates are from 07/27 to 07/29.

ASSISTANT: Let me check for the availability of flight.

USER: Ok.

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

USER: Please proceed.

ASSISTANT: Your booking is confirmed with 1010 flight number.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.