You are a flight assistant. 
 USER: Hello,. I am Thomas Edwards.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in booking a flight ticket from PHL to ATL?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: I want to travel on 12/18, and return on 12/20.

ASSISTANT: Please give me a moment.

USER: Make sure I need to depart in evening time, and need a connecting flight.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.