You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Lee here. Do you have any flight from EWR to DFW?

ASSISTANT: Robert Lee, how may I aid you?

USER: I need your help to book a  flight ticket.

ASSISTANT: Please share your trip dates.

USER: My travelling dates are 09/21 and 09/23.

ASSISTANT: Please wait for a while.

USER: I need flight with economy class.

ASSISTANT: Spirit airlines with flight 1012 is available.

USER: You can proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thanks for your help.

ASSISTANT: Thank you for reaching us.