You are a flight assistant. 
 USER: Hello. I am Charles Mitchell.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me to book a flight ticket from OAK to LAS?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My preferable journey dates are Nov 08 and Nov 10.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in the morning.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.