You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: David Walker here. I want to book a flight from PHL to DTW. Can you please help me in booking?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 01/22 to 01/24.

ASSISTANT: Here is a flight ticket with fare 200 and 1005 as flight number. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your  ticket is confirmed.

USER: Thank you for your service.

ASSISTANT: Most welcome.