You are a flight assistant. 
 USER: Hello, myself Donald Green.

ASSISTANT: Hello, How can I be of your help?

USER: Can you please reserve me a flight ticket on 07/16 to Washington?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please mention your depart and arrival airport codes?

USER: I want to fly from Dallas & Fort Worth, TX - DFW to reach DC - DCA.

ASSISTANT: When you are willing to return from Washington?

USER: I intend to return on 07/18.

ASSISTANT: There is a connecting flight from Frontier airline of fare 100 and flight number 1000. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your flight ticket is confirmed.

USER: Thank you.

ASSISTANT: Thanks for using our service.