You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself James Allen. I would like to book a flight to Boston for visit a minister for advising him.

ASSISTANT: Ok, Could you please provide your travelling dates?

USER: My travel dates are from 09/09 to 09/11.

ASSISTANT: Can you please help me with the airport codes?

USER: My airport codes are from LAX to BOS.

ASSISTANT: Please allow me a moment to check for the availability of flight.

USER: Sure.

ASSISTANT: Your patience is greatly appreciated. James, I am sorry to inform you that there is no flight available at your requested dates.

USER: No issues with it. Thanks for checking.

ASSISTANT: You are welcome. Thank you for contacting us.