You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I need to book a flight ticket from BOS to OAK to enjoy Innovation festivals. Can you help me in booking a flight ticket?

ASSISTANT: Sure, I will help you. Could you please provide your planned journey dates?

USER: Sure, my scheduled dates are Nov 30 and Dec 2.

ASSISTANT: May I know your name please?

USER: Sure, Charles Clark here.

ASSISTANT: Do you have connection preference?

USER: I need a direct flight.

ASSISTANT: Do you have any other preferences?

USER: I would prefer depart time at evening.

ASSISTANT: May I know your airline preference?

USER: I am comfortable with any airline.

ASSISTANT: Charles Clark, no flights has been found on your preferences.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.