You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at this moment?

USER: I planned to meet my friend in IAD, can you please help me to book a flight ticket from PHL?

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

USER: I prefer to travel on Sep 23 and Sep 25.

ASSISTANT: May I know your connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, please let me know your name to proceed further.

USER: I am Anna Wright.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.