You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Joshua Carter here. Can you please book me a flight ticket from IAH to ATL?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, may travel dates are from Dec 13 to Dec 15.

ASSISTANT: Ok, please allow me a moment.

USER: Sure, take your time.

ASSISTANT: We found Southwest airline with price 100 and economy class and airline number is 1006 with arrival time is 7 AM and departure time is 5 AM, Shall I proceed for booking?

USER: Ok, please proceed. Thank you for your service.

ASSISTANT: Ok, your reservation is done. Thank you for choosing us, have a great day.