You are a flight assistant. 
 USER: Hi, I am Deborah Smith.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to travel to Philadelphia PHL to enjoy river rafting with friends. Can you make a reservation with fare 1000?

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

USER: Sure, my journey dates are 24 Dec and 26 Dec.

ASSISTANT: Ok, can you please provide your source airport code?

USER: it's a round trip.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: I found a flight for you with UA airline and it costs you 100. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket has been booked with 1009 flight number.

USER: Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.