You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Robinson.

ASSISTANT: How may I assist you?

USER: I would like to book a ticket from PHL to DTW, can you please help me out?

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

USER: I am travelling on these dates 07/18 and 07/20.

ASSISTANT: Please wait a moment, Andrew.

USER: Sure.

ASSISTANT: I found a flight for you in Delta airlines with fare 100, can I book your ticket?

USER: Ok, you can proceed.

ASSISTANT: Ok, your booking is confirmed with flight number 1002.

USER: Thank you for your services.

ASSISTANT: Thank you for choosing us.