You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please assist me for booking from DCA to SFO to attend for a seminar?

ASSISTANT: Sure, do you need a connecting flight?

USER: I need a connected flight.

ASSISTANT: When do you want to start and return on?

USER: I would like to depart on June 13 and return on June 15.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can I know your good name?

USER: My name is Gary Lewis.

ASSISTANT: Thank you for your details, we found a connecting flight 1020 in class economy which is in Frontier airline. Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.