You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please help me in booking a flight ticket to SFO from DFW?

ASSISTANT: Sure, I am glad to help you in booking. Could you please share your travel dates?

USER: My travel dates are from May 11 to May 13.

ASSISTANT: Do you have any specification?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: I am Joseph Anderson.

ASSISTANT: Here, I found a direct flight for you in economy class and it costs you 100. Can I proceed?

USER: You can proceed.

ASSISTANT: Your booking is done with flight 1023 in Spirit airlines.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe flight.