You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Brain Martinez here.

ASSISTANT: How can I aid you?

USER: I would like to book a flight from IAH to DCA. Can you please help me with this?

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

USER: Sure, I want to fly on Oct 29 and need to return on Oct 31.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Here, I found a flight for you with single connection. Shall I proceed for booking?

USER: If it is economy class then proceed for booking.

ASSISTANT: Your ticket is booked with flight number 1000 and airline is Spirit.

USER: Thank you.