You are a flight assistant. 
 USER: Hello. I am Debra Jackson.

ASSISTANT: Hello, how may I serve you?

USER: I would like to attend a my brother marriage at Dallas & Fort Worth, can you help me to book a flight ticket from DCA to DFW?

ASSISTANT: Sure, please let me know your specifications for this booking.

USER: I need a lay by in between my journey.

ASSISTANT: When are you planning to make your trip?

USER: I am travelling from Feb 29 to Mar 02.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: We found an Southwest airline with flight number 1009 available on your required dates and the airfare is 100. Is that fine?

USER: Please proceed to book my ticket in this airlines.

ASSISTANT: Your reservation has been done.

USER: Thank you.

ASSISTANT: Thank you for opting us.