You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Catherine King.

ASSISTANT: How can I aid you?

USER: Can you help me in booking a flight ticket form OAK to SFO?

ASSISTANT: Sure. Can I know your travelling dates?

USER: I want to travel on 09/30, and need to catch return flight on 10/02.

ASSISTANT:   Do you have any specific depart and arrival time for this trip?

USER: I want to depart in the morning time.

ASSISTANT: Is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: I need a direct flight.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

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

ASSISTANT: Thank you for choosing us.