You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to book a flight ticket from OAK to LAS, can you please help me?

ASSISTANT: Yes, I am here to help you. Can I know on which dates you want to travel?

USER: My planned dates are Nov 10 and Nov 12.

ASSISTANT: Ok, do you need any connection in between the journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please share your other preferences.

USER: I am looking for a business class.

ASSISTANT: May I know your name please?

USER: Eric Johnson here.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, sorry no flights found with your details.

USER: Not a [problem, thank you for checking.

ASSISTANT: Thank you for reaching us, have a  good day.