You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Would you please help me in booking a ticket from OAK to CLT.

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

USER: My itinerary travel dates are as follows Apr 21 and Apr 23.

ASSISTANT: May I know your connection limit?

USER: I would like to board a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I have no more preferences.

ASSISTANT: Ok, please share your name.

USER: Paul Lee.

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

USER: No Issue, thank you for the information.

ASSISTANT: Thank you for reaching us.