You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you help me in booking a flight ticket from OAK to PHL?

ASSISTANT: When you are willing to travel?

USER: I want to travel on 02/23, and return on 02/25.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in the afternoon time and I prefer for normal cost airline.

ASSISTANT: May, I know your good name?

USER: I am Brenda Carter.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.