You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Joseph Rodriguez. I am planning to go for science exhibition at San Francisco, SFO. Can you please book a ticket on 05/10?

ASSISTANT: Sure, could you please provide your origin airport code?

USER: Dallas, DFW is my boarding point.

ASSISTANT: Please provide your return journey date.

USER: I will return back on 05/12.

ASSISTANT: Let me know your specifications?

USER: I need a connecting flight.

ASSISTANT: We found a flight with single connection and price is 100 of 1011 flight.

USER: I can afford up to 5000.

ASSISTANT: Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been confirmed with Delta airlines.

USER: Thank you.

ASSISTANT: Thank you for choosing us.