You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Catherine Johnson, I want to book a flight to visit Washington DC. Can you book a connecting flight for me?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I will fly on 07/23 and return on 07/25.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: My source point is DC-DCA and my destination is DC-IAD.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found a flight ticket with a price of 100 and 1 connection.

USER: Please proceed with booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for contacting us.