You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am Thomas Walker, can you help me to book a flight from PHL to LAS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are Aug 09 and 11.

ASSISTANT: There is a flight with connection 1 and price 500, can I proceed?

USER: Proceed with booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1001.

USER: Thank you.

ASSISTANT: Thank you for reaching us.