You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: I need your help in booking a flight ticket.

ASSISTANT: Sure, may I know your travelling dates?

USER: June 11 and 13 are my planned travelling dates.

ASSISTANT: Can you share me your airport codes?

USER: PHL and OAK are my in and out airport codes.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your name?

USER: Jack Taylor here.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: That's ok. Thank you.

ASSISTANT: Thank you.