You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a flight ticket from MCO to BOS?

ASSISTANT: Sure, we are happy to help you. Can I have your travelling dates?

USER: My trip dates are 19 to 21 of Apr.

ASSISTANT: Do you have any stopover in between journey?

USER: I want a connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Lisa Nelson.

ASSISTANT: Sorry, we are unable to provide flights on your journey dates.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for opting us.