You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Please book me a flight ticket from SFO to OAK to meet my family.

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

USER: I have planned to travel on Mar 02nd and return on Mar 04th.

ASSISTANT: Can I have your name please to proceed further?

USER: Dennis Wright.

ASSISTANT: Do you have any connection preference?

USER: I prefer connecting flight.

ASSISTANT: May I know your other specifications?

USER: I want to return at afternoon time.

ASSISTANT: Dennis Wright, no flights has been found on your preferences.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.