You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you reserve me a ticket from BOS to EWR?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My trip dates are July 17 to 19.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight in business class which departs in morning and return in afternoon time.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please provide your name.

USER: Donald Allen here.

ASSISTANT: There are no flights found under your preferable details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome, have a great day.