You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you for the day?

USER: I want to book a flight ticket to attend an event from PA. Can you help me?

ASSISTANT: Sure, can you please assign your journey dates?

USER: Jan 08th and 10th are my travelling dates.

ASSISTANT: Do you prefer connecting or direct  flight in your journey?

USER: I need a connecting flight.

ASSISTANT: May I know your boarding airport code?

USER: I would like to land on OAK.

ASSISTANT: Are there any more specifications?

USER: My depart time should be in the evening.

ASSISTANT: May I know your name please?

USER: Samuel Mitchell here.

ASSISTANT: Sorry, there are no flights are available matching your preferences.

USER: No issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.