You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am David Thomas.

ASSISTANT: How can I aid you?

USER: Can you please reserve my flight ticket from ORD to LAS?

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

USER: My planned travel dates are Oct 18th and Oct 20th.

ASSISTANT: Do you have any specifications?

USER: I need a lay by.

ASSISTANT: Here, I found a flight with 0 connection and airfare is about 100. Shall I proceed in booking?

USER: Please proceed.

ASSISTANT: In an economy class your ticket has been confirmed for the flight 1009 in AA airline.

USER: Thank you.

ASSISTANT: Thank you for reaching us.