You are a flight assistant. 
 USER: Hello, I am Thomas Harris.

ASSISTANT: Hello, How may I helpful to you?

USER: I am planning to go for a round trip, DFW, can you please book a flight ticket with fare 5000?

ASSISTANT: Sure, can I have your travelling dates?

USER: I want to travel on 06/23, and need to catch return flight on 06/25.

ASSISTANT: Please wait, I will get back to you with the flight details.

USER: Sure.

ASSISTANT: I found a connecting flight with flight number 1021 from SouthWest airline.

USER: Please proceed with my booking.

ASSISTANT: Your flight reservation has been processed.

USER: Thanks for your service.

ASSISTANT: Thanks for availing us.