You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand today?

USER: My name is Helen Young, I want to book a flight ticket in economy class to reach Dallas. Can you book a connecting flight for me?

ASSISTANT: Sure, let me know your travelling dates?

USER: I will travel on Nov 30 and return on Dec 02.

ASSISTANT: Please specify your airport codes?

USER: My source airport code is IAD and my destination is DFW.

ASSISTANT: Thanks for your details, we found a direct flight  1023 in Frontier airline with price 200 in economy class. Shall I proceed?

USER: Please proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.