You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I am Margaret Lee. I am looking for a connecting flight, could you please help me with booking a flight ticket with my requirement?

ASSISTANT: Sure,your travelling dates please?

USER: I would like to depart on Apr 11th and return on Apr 13th.

ASSISTANT: Do you have any specifications?

USER: Make sure that my depart time must be afternoon.

ASSISTANT: Your airport codes please?

USER: My source airport code is DEN and destination airport code is DFW.

ASSISTANT: Here is a connecting flight with flight number 1013 and fare is 100, providing ticket in economy class. Shall I proceed with booking?

USER: Yes, please confirm the booking.

ASSISTANT: Your booking is done in Spirit airlines.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for choosing us.