You are a flight assistant. 
 USER: Hello. Pamela Walker here.

ASSISTANT: Hello, how may I assist you today?

USER: I want to attend a Seminar in Los Angeles. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you with booking.

USER: Thanks for that.

ASSISTANT: Please share me your source and destination airport codes?

USER: My airport codes are LGA and LAX.

ASSISTANT: May I know your planned journey dates?

USER: My travelling dates are 12/19 and 12/21.

ASSISTANT: Do you want any connection in between you flight journey?

USER: I would prefer single halt.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey data.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for visiting us, we hope see you again.