You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are Mar 9th and Mar 11th.

ASSISTANT: Do you have any specifications?

USER: I prefer a connecting flight which returns in the evening.

ASSISTANT: May I know your good name?

USER: I am Benjamin Green.

ASSISTANT: There were no flights found with your required dates to travel.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.