You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you now?

USER: I am looking for a flight from BOS to SEA, can you help me in booking?

ASSISTANT: Ok, can you please mention your travelling dates for this journey?

USER: Sure, my planned travel dates are mar 09 and Mar 11.

ASSISTANT: Do you need a direct flight?

USER: Yes, please look for it.

ASSISTANT: May I know your class preference?

USER: I am looking for a business class flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name to proceed further?

USER: Yes, myself Melissa Scott.

ASSISTANT: Sorry to say, there are no flights available for your journey. Sorry for the inconvenience Melissa Scott.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for approaching our agency, have a great day.