You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I need you to book a flight ticket from OAK to PHX. Please help me.

ASSISTANT: Sure, can you please share your travel dates?

USER: December 19 and 21 are my planned travelling dates.

ASSISTANT: May I know your connection limit?

USER: I would prefer to fly in a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: Nothing much to state.

ASSISTANT: May I know your name?

USER: Elizabeth Anderson.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.