You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how  may I help you for the day?

USER: Can you please help me to book a flight?

ASSISTANT: Sure, when would you like to travel?

USER: I would like to depart on Aug 4th and return back on Aug 6th.

ASSISTANT: Help me with the airport codes?

USER: I will fly from DFW to EWR.

ASSISTANT: Do you have any preferences?

USER: I prefer to travel in well known airlines.

ASSISTANT: May I know your name please?

USER: My name is Patrick Lee.

ASSISTANT: We found a flight in an airline Southwest with 1015 number having a single connection price of 100. Shall I proceed to book?

USER: It looks good to me, please confirm it.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a safe flight.