You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Please book me a flight ticket from DCA to DFW.

ASSISTANT: Sure, to book a ticket can I know your planned travel dates?

USER: I will start on Dec 29th and return on Dec 31st.

ASSISTANT: Let me know your requirements.

USER: I need 1 lay by.

ASSISTANT: Kindly mention your name please?

USER: I am Katherine Adams.

ASSISTANT: We found a flight with an Spirit airline of flight 1010 in an economy class with single connection.

USER: Fine, please go ahead.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you.