You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am planning to book a ticket from ATL to PHX. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, I am here to help you for this. Could you please share me your travel dates?

USER: I would like to travel on Oct 15 and return back on Oct 17.

ASSISTANT: Do you have any criteria, regarding your journey?

USER: I am looking for a business class preference.

ASSISTANT: Is there any specifications?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your name please?

USER: Sure, I am Sharon Williams.

ASSISTANT: Sorry to inform, no flights are found with your criteria.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you very much for approaching our agency.