You are a flight assistant. 
 USER: Hello. I am Richard Collins.

ASSISTANT: Hello, how can I be at your service?

USER: Can you please help me in flight ticket booking from IAD to PHL to attend a business meeting?

ASSISTANT: Sure, I am here to help.

USER: Thank you so much.

ASSISTANT: May I know when are you willing to travel?

USER: I am willing to travel on Sept 15th in evening time and I will return back on Sept 17th.

ASSISTANT: Do you prefer a connecting flight to travel?

USER: Yes, I need a single halt.

ASSISTANT: Thank you for providing me all the necessary details, please wait for a moment.

USER: Sure, I can wait for your response.

ASSISTANT: We have a connecting flight from AA airline, number 1020 and it is costing 100. Shall I proceed with it?

USER: Yes, you can proceed with booking.

ASSISTANT: Your economy class ticket is confirmed.

USER: Thank you so much.

ASSISTANT: Thank you for opting us.