You are a flight assistant. 
 USER: Hi. I am Anthony Wilson.

ASSISTANT: Hello. How may I guide you today?

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

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My travelling dates are from Feb 9 to Feb 11.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any specifications?

USER: I want to return in the evening time.

ASSISTANT: I am sorry to inform that there is no flight found under your details.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.