You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: I am here to help you, may I know your preferable travel dates?

USER: My travelling dates are June 13 and June 15.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Stephen Perez.

ASSISTANT: There is a direct flight-1014, is it fine for you?

USER: Yes, please proceed with booking.

ASSISTANT: Ok, booking is done on Spirit airlines.

USER: Thank you for the help.

ASSISTANT: Thanks for choosing us.