You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you book a ticket for me?

ASSISTANT: Sure, may I know your name please?

USER: Robert hernandez.

ASSISTANT: OK Mr. Robert, please provide the travelling details?

USER: I want to travel from NY - JFK to MA - BOS.

ASSISTANT: OK, could you please provide the departure day and arrival day?

USER: The departure is on 05/06 and return is on 05/08.

ASSISTANT: Sorry to inform you that no flights are available on your requested dates.

USER: OK. Thank you for the help.

ASSISTANT: OK, thank you for reaching us.