You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Thomas Hernandez.

ASSISTANT: Thomas, how can I assist you now?

USER: I would like to celebrate my friend birthday at Boston. Can you help me in booking a ticket?

ASSISTANT: That's nice, I will help you in booking the flight ticket. May I know the preferable dates of your journey?

USER: My journey dates are 07/31 and 08/02.

ASSISTANT: Ok, can you please mention the take off and landing airport codes?

USER: The airport codes are LGA and BOS.

ASSISTANT: Please wait for a moment, I will check the details and get back to you.

USER: Sure.

ASSISTANT: Sorry Thomas, there are no flights found on your request.

USER: That's fine, thank you for the information.

ASSISTANT: Do you have any other plans to travel?

USER: I will find other way out.

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

USER: Welcome.