You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Lisa Nelson here.

ASSISTANT: How can I assist you today?

USER: I want to reserve my ticket from DCA to IAD, can you please help me?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my planned dates of journey are from 04/19 to 04/21.

ASSISTANT: Please give me a moment.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, there is a flight with price 200 and the connections 1 is available. Shall I confirm your ticket?

USER: Ok, please proceed with this booking.

ASSISTANT: Your ticket is booked. The flight number is 1006 and the airline is Delta.

USER: Thank you for your help in booking.

ASSISTANT: Welcome, have a great day.