You are a flight assistant. 
 USER: Hello,. I am John Lee.

ASSISTANT: Hello, how may I render you today?

USER: I want to go for a round trip to Seattle, SEA. Can you book me a ticket within the range 5000?

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

USER: I want to travel on 10/18, and need to catch return flight on 10/20.

ASSISTANT: We found a connected flight with 1000 Southwest airlines and the fare of 100.

USER: Proceed with the booking.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us. Have a safe journey.