You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Susan King.

ASSISTANT: Susan, how can I assist you today?

USER: On the part of my project, I need to go Philadelphia. Can you please help me out in booking the ticket from New York?

ASSISTANT: Ok, please tell me your travel dates.

USER: Sure, my departure date is 03/23 and I want to return on 03/25.

ASSISTANT: May I know your airport codes?

USER: Sure, my source airport code is EWR and destination airport code is PHL.

ASSISTANT: Please wait for a moment.

USER: Sure, I'll wait.

ASSISTANT: Sorry Susan, there is no flight available on your route.

USER: That's ok, I'll reach my destination by some other mode of transport. Thank you for your service.

ASSISTANT: Thank you for reaching us.