You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am John Anderson.

ASSISTANT: How can I assist you today?

USER: I want to book a flight ticket from DC-IAD to PA-PHL. Can you help me?

ASSISTANT: Sure, can I know your preferable dates?

USER: 01/20 and 01/22 are my travelling dates.

ASSISTANT: Do you have any specifications?

USER: I  need a connecting flight.

ASSISTANT: Please wait for some time.

USER: Ok.

ASSISTANT: There is a flight with Delta airline having airfare is 200 and economy class. Shall I proceed to booking?

USER: You can reserve it.

ASSISTANT: Your ticket is confirmed with the flight-1027.

USER: Thank you for your help.

ASSISTANT: Thanks for reaching us.