You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Anthony Phillips here. I want to book a flight reservation on the route from SEA - PHL, can you help me out?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates for this journey will be from 08/15 to 08/17.

ASSISTANT: Let me check for the availability of flight.

USER: Sure, take your own time.

ASSISTANT: Anthony, there is no flight available at your requested dates.

USER: Oh! That's sad news, thank you for checking anyways.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: You are most welcome.