You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Donald Green.

ASSISTANT: In which way I can help you at this moment?

USER: I am planning to visit Philadelphia, will you help me in booking the flight ticket from OAK to PHL?

ASSISTANT: Sure, I am happy to help you with that. Can you please mention your preferable travel dates?

USER: My travelling dates are July 06 and July 08.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: My depart time must be in morning.

ASSISTANT: Are you okay with connecting flight or you need any direct flight?

USER: I always prefer connecting flight.

ASSISTANT: Is there any additional preferences do you have?

USER: No, thank you for asking.

ASSISTANT: Ok, please hold on a moment.

USER: Ok, I will wait for you response.

ASSISTANT: Sorry, no flights are available in this route as per your requested details.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.