You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in reserving a flight ticket to DCA from JFK?

ASSISTANT: I am here to help you, may I know your travelling dates?

USER: My travel dates are from Dec 18 to Dec 20.

ASSISTANT: May I know your class preferences?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: I would like to return in the evening. I need a connecting flight.

ASSISTANT: May I know your good name?

USER: I am Nancy Rodriguez.

ASSISTANT: There is a connecting flight-1026 in economy class, shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Booking is done on Frontier airlines.

USER: Thank you.

ASSISTANT: Thanks for choosing us.