You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Evans.

ASSISTANT: How can I aid you?

USER: I need to attend the party on 07/28 and return to PHL on 07/30. Could you please help me in booking a ticket on those days?

ASSISTANT: Sure, I can help you. Please share me your airport codes.

USER: My airport codes are PHL and SEA.

ASSISTANT: Do you need any connecting flights?

USER: Yes, I need a connecting flight.

ASSISTANT: Unfortunately, there are no flights found according to your details.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for choosing us.