You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to take part in Boston marathon, so please book my ticket from SFO to BOS.

ASSISTANT: Sure, I will help you. When would you like to plan your journey?

USER: My itinerary dates are Oct 6 and 8.

ASSISTANT: May I know your name please?

USER: Sharon Smith here.

ASSISTANT: Do you have any connection preference?

USER: I prefer a connecting flight.

ASSISTANT: May I know your other specifications?

USER: I have no other specifications.

ASSISTANT: Sharon Smith, no flights has been found on your planned travel dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.