You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I want to attend a Seminar in Oakland. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, May I know your journey airport codes?

USER: My airport codes are ORD and OAK.

ASSISTANT: Ok, please let me know your travelling dates.

USER: My travelling dates are Mar 15 and Mar 17.

ASSISTANT: Ok, Do you have any class preference?

USER: I want to travel in business class.

ASSISTANT: Ok, Kindly mention your connection limit.

USER: I need single connecting flight.

ASSISTANT: Ok, Do you have any other preferences related to booking?

USER: No.

ASSISTANT: Ok, May I know your name for booking purpose?

USER: My name is Thomas Young.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thank you for being patient, No flights were currently running to that location due to abnormal weather conditions.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.