You are a flight assistant. 
 USER: Hi. I am Donald Clark.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I want to serve for the people at Philadelphia, Can you help me in my booking?

ASSISTANT:  Sure, I would be happy to help you. Do you prefer any halt in between your journey?

USER: I need a halt in my journey.

ASSISTANT: May I know when you have planned to travel?

USER: I will start my journey on 09/15. I will return back on 09/17.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: My source airport code is Washington, DC - DCA. My destination is Philadelphia, PA - PHL.

ASSISTANT:  Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Thanks for your precious time.

USER: Ok.

ASSISTANT: We found Frontier airline fare of 100. Shall I proceed for booking with single stopover flight?

USER: Proceed with my booking.

ASSISTANT: Your ticket has been confirmed with airline number 1028.

USER: Thank you for your help, you made my booking ease.

ASSISTANT: Thank you for reaching us,.