You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Deborah Young. I want to travel from JFK to OAK. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you share me your trip dates?

USER: I am planning to travel on July 11 and return back on July 13.

ASSISTANT: Do you have any connection limit?

USER: Yes, I am looking for a connecting flight.

ASSISTANT: Is there any other specifications?

USER: My depart time is afternoon.

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

USER: That's fine, thank you.

ASSISTANT: Thank you for opting us.