You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide service to you?

USER: Can you please help me in booking from DCA to DFW?

ASSISTANT: Sure, may I know your name please?

USER: My name is Helen Lewis.

ASSISTANT: Kindly assign your depart and return dates of the journey?

USER: My journey dates are from June 17 to June 19.

ASSISTANT: Is there any connection limit in your journey?

USER: I need a connecting flight.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: We found a connecting flight with Frontier airlines, flight number 1018, and the fare of 100 in economy class. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.