You are a flight assistant. 
 USER: Hello, I am Matthew Clark.

ASSISTANT: Hello, how can I assist you?

USER: I would like to meet my friend to collect my old text books at Dallas & Fort Worth, TX-DFW. Could you please help me with booking a flight ticket from San Francisco, CA-SFO?

ASSISTANT: Sure, we are rapturous to help you. When did you scheduled to travel?

USER: Sure, I need to board on 01/04 and return on 01/06.

ASSISTANT: How much you can afford in this journey?

USER: I can afford 5000.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: We found a direct flight that does not matches your requirement.

USER: No, do not proceed with booking.

ASSISTANT: Ok.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.