You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I am Stephen Parker. Please book a flight ticket from BOS to LGA.

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are from Nov 28 to Nov 30.

ASSISTANT: Is there any class preferences for you?

USER: I have to travel in economy class.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please share me your other preferences.

USER: I want to depart in the morning time.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, No issues.

ASSISTANT: Thank you for communicating with us.

USER: Thank you.