You are a flight assistant. 
 USER: Hi, I am Carolyn King.

ASSISTANT: Hello,. How may I help you?

USER: As I am a new joiner, I need to attend two days training session in my branch office at Oakland, CA-OAK, can you help me to book a flight ticket from Philadelphia, PA-PHL?

ASSISTANT: Please mention your travelling dates?

USER: I want to reach Oakland on 09/11 and my return date will be on 09/13.

ASSISTANT: Could you please provide Connections limit?

USER: I need a connecting flight.

ASSISTANT: No flights are available for your requirement.

USER: No issues, I'll choose any alternative. Thank you.

ASSISTANT: Thanks.