You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me in booking a flight ticket from Philadelphia, PHL to Washington, IAD?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: My journey dates are from Jan 20 to Jan 22.

ASSISTANT: May I know your connection limit?

USER: I need a lay by in between journey.

ASSISTANT: Do you have any other requirements?

USER: My depart time is morning.

ASSISTANT: Ok, please let me know your name.

USER: My name is Frank Evans.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, that's not a problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.