You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am looking for a direct flight, could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: I would like to take off 08/17 and return on 08/19.

ASSISTANT: Please help me with your airport codes.

USER: My source airport code is DFW and destination airport code is SFO.

ASSISTANT: Sorry, there is no direct flight with your requirements.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: May I know your name please?

USER: I am Brenda Gonzalez.

ASSISTANT: Thank you for contacting us.

USER: Thank you for the information.