You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to travel from DCA to ATL as a holiday trip. Can you do the reservation?

ASSISTANT: Sure, I can help you with that. May I know your planned departure and return travel dates please?

USER: My trip dates are 05/01 and 05/03.

ASSISTANT: Can I have your good name please?

USER: Carol Miller here.

ASSISTANT: Ok, may I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: May I know your airline preference please?

USER: I need break in my journey with low cost.

ASSISTANT: Ok, please let me know if you have any other specifications.

USER: Departure time is afternoon.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for choosing us, have a nice day.