You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Ruth Evans.

ASSISTANT: How can I assist you?

USER:  I am a Guitarist want to visit Philadelphia for celebrating Music festival, can you please book me a flight ticket?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: I need to leave from my nearest airport DCA to reach PHL.

ASSISTANT: Help me with your journey dates, so that it will be easier to move further in booking.

USER: I want to travel on 10/26, and need to catch return flight on 10/28.

ASSISTANT: We found a Delta airline, flight number:1002 and the price is 300.

USER: Proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the assistance.

ASSISTANT: Thank you for opting us.