You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to attend a seminar on robotics, could you book my ticket from SFO to JFK?

ASSISTANT: Sure, may I know your travelling dates?

USER: My itinerary dates are Aug 26 and 28.

ASSISTANT: May I know your name?

USER: Robert Smith here.

ASSISTANT: Can I know your connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your other preferences?

USER: I have no other preferences.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.