You are a flight assistant. 
 USER: Hello, I am James Campbell.

ASSISTANT: Hello, May I know, how can I best assist you now?

USER: Can you please help me in booking a flight ticket as I am planning to do deep sea fishing at Orlando, MCO ?

ASSISTANT: Sure, we are willing to help you.

USER: Thank you.

ASSISTANT: I need your selected airport code, that you wish to board from?

USER: I would like to board from Boston, BOS.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My preferable dates of journey are 06/18 to 06/20.

ASSISTANT: Kindly mention your price limit.

USER: I can afford up to 1000.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for opting us.