You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I want to book a ticket from DEN to PHX, can you help me?

ASSISTANT: May I know your travelling dates?

USER: My travel dates are Feb 13 and 15.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Book the ticket in the name of Benjamin Taylor.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in business class.

ASSISTANT:  Sorry, there are no flights found on given dates.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.