You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to book a ticket from ATL to OAK. Can you please help me out?

ASSISTANT: Sure, I am willing to help you for this. When are you planning your trip?

USER: I am planning to travel on July 01 and return back on July 03.

ASSISTANT: May I know your name please?

USER: My name is Robert  Hall.

ASSISTANT: At what time are you planning to depart and return?

USER: My depart time is Afternoon and return time should be evening.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a connecting flight.

ASSISTANT: Sorry for inconvenience, no flights are found with your specifications.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you very much for approaching our agency.