You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David King.

ASSISTANT: How can I assist you David?

USER: I would like to have a round trip from Dallas, can you please book me a ticket from DFW to DFW?

ASSISTANT: Sure, I'm gleeful to help you. Can you please let me know on which dates are you planning your journey?

USER: My preferable journey dates are from 06/05 to 06/07.

ASSISTANT: David, please wait for a moment.

USER: Sure, take your own time.

ASSISTANT: JetBlue airlines is having a flight on that route with travel charge of 100, shall I proceed for booking?

USER: That's ok for me. Please book my ticket with this airlines.

ASSISTANT: I have successfully booked your ticket with flight-1011, have a safe journey.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.