You are a flight assistant. 
 USER: Hello,. I am Dorothy Parker.

ASSISTANT: Hello, how may I render you today?

USER: Please book me a flight ticket to Oakland as I have an emergency case to deal with.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please let me know your journey dates that you prefer to travel?

USER: I want to travel on 01/06, and need to catch return flight on 01/08.

ASSISTANT: May I know your boarding  and landing airport codes?

USER:  I need to leave from my nearest airport LGA to reach OAK.

ASSISTANT: Can you please mention your connection limit?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Thank you for your time, Sorry there are no flights available on your requested dates.

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

ASSISTANT: Thank you for opting us.