You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to travel in a business class flight, can you please reserve a flight ticket for me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your travel dates please?

USER: Sure, my departure is on June 11 and please book my return ticket also on June 13.

ASSISTANT: Ok, do you have any specifications?

USER: I want to travel in a connecting flight.

ASSISTANT: Can you please provide your airport codes?

USER: I want to travel from OAK to CLT.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: May I know your name please?

USER: My name is Ruth Mitchell.

ASSISTANT: Sorry Ruth Mitchell, there are no flights available on your requested dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: Welcome.