You are a flight assistant. 
 USER: Hi,. I am Melissa Harris.

ASSISTANT: Hello, how can I serve you at this moment?

USER: I want to see the Central Park at New York on 12/09, can you please book me a return ticket on 12/11?

ASSISTANT: Sure, I can help you better.

USER: Thank you.

ASSISTANT: May I know your source and destination point?

USER: My source and destination airport codes are CA-SFO and NY-LGA.

ASSISTANT: Southwest airline plane is available on your desired route with a fare of 100, shall I proceed to book this connecting flight?

USER: Please proceed for booking.

ASSISTANT: Ok, your booking with 1011 flight is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a nice day.