You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking from DCA to SFO?

ASSISTANT: Sure, I will help you. Can I have your planned travel dates please?

USER: My travelling dates are from May 14 to May 16.

ASSISTANT: May I know your name please?

USER: My name is Carolyn Rodriguez.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: I found an economy class in American Airlines with fare 100 and it has single connection. Can I book your ticket?

USER: Ok, book it.

ASSISTANT: Ok, your booking is confirmed with flight number 1027.

USER: Thank you.

ASSISTANT: Thank you for reaching us.