You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Please help me to book a direct flight to Oakland to treat an emergency case.

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: Sure, I want to reach CA on 06/25 and my return date will be on 06/27.

ASSISTANT: Please share me your airport codes.

USER: My source and destination airport codes are HOU and OAK.

ASSISTANT: Is there any other specifications?

USER: No more specifications for this trip.

ASSISTANT: May I know your name?

USER: I am Margaret Allen.

ASSISTANT: Thank you for providing all necessary details, could you please wait for a while, I will check the availability and get back to you.

USER: Sure.

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

USER: No issue. Thank you for your information.

ASSISTANT: Thank you for picking us.