You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Could you please book a flight ticket from IAD to DCA?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates?

USER: My travelling dates are Sept 09 and Sept 11.

ASSISTANT: May I know your name?

USER: My name is Stephanie Carter.

ASSISTANT: Do you have any other specifications?

USER: I need a direct flight. And I want to depart in the evening.

ASSISTANT: We found American airlines with connecting flight and number 1013 fare of 100 with economy class, Shall I proceed for booking?

USER: Do not proceed.

ASSISTANT: Ok, thanks for approaching us.