You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I need to book a flight ticket from BOS to LGA. Can you please book a connected flight ticket?

ASSISTANT: Sure, May I know your travelling dates?

USER: My journey dates are Oct 18 and Oct 20.

ASSISTANT: Do you have any class preference?

USER: I prefer a Business class.

ASSISTANT: Is there any other preferences?

USER: I am looking for a return flight time at evening.

ASSISTANT: May I know your name?

USER: I am Michelle Allen.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: No problem, thank you for your information.

ASSISTANT: Thank you.