You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I am Sarah Parker. I am planning to meet my cousin at Dallas, DFW. Can you please book a direct flight for me?

ASSISTANT: Sure, May I know the source code?

USER: Source code is New York, EWR.

ASSISTANT: Please help me with your travel dates.

USER: Journey dates are 03/15 to 03/17.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem.

ASSISTANT: Thank you for availing us.

USER: Thank you.