You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Samantha Perez. I want to visit Independence Hall with my friend, could you help me in booking the ticket?

ASSISTANT: Sure, please provide the airport codes?

USER: Its from EWR to PHL. The dates of travel are from 09/05 to 09/07.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: That's ok. Thank you for your time.

ASSISTANT: You are Welcome.