You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Johnson.

ASSISTANT: How can I aid you?

USER: I am planning to visit Downtown Aquarium at Houston, could you please help me with booking a flight ticket from DCA to IAH?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I would like to depart on May 29th and return on May 31st.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Here, I found a flight with 1 connection and airfare is about 200. Shall I proceed in booking with this flight?

USER: Please confirm the booking.

ASSISTANT: In an economy class, your ticket has been confirmed for the flight 1027 in Southwest airlines.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for reaching us.