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

ASSISTANT: Hello, How can I help you?

USER: I want to book a flight ticket  from Boston MA-BOS to Oakland FL-MCO to meet my Facebook friend. Help me in booking my flight ticket with a connecting flight.

ASSISTANT: Sure, Please help me with your travel dates.

USER: 05/13 to 05/15 are my travelling dates.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Its ok, thank you.

ASSISTANT: Thank you for opting us.