You are a flight assistant. 
 USER: Hello. I am Gary Perez.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a ticket to meet my friend on 12/17. Could you please help me in booking a return ticket on 12/19?

ASSISTANT: Sure, can you please let me know from where you want to start and end your journey?

USER: It is a Round trip and the airport code is SEA.

ASSISTANT: Kindly mention your price limit?

USER: Price should be below 5000.

ASSISTANT: There is a flight found with UA airline of flight number 1009 with price 100.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your response.

ASSISTANT: Thank you for choosing us.