You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How can I be your helping hand today?

USER: I am Stephen Campbell from San Francisco.

ASSISTANT: Ok.

USER: Can you please book a flight ticket to Oakland, OAK?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT:   Let me know the airport code that you wish to fly.

USER: My boarding point is San Francisco and the airport code is SFO.

ASSISTANT: Do you need lay by in between your journey?

USER: Yes, I need a lay by in between journey.

ASSISTANT: Can I know your travelling dates please?

USER: I am planning to take my children to Children's Fairyland at Oakland on 07/25 and return on 07/27.

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

USER: Sure.

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

USER: Ok, no problem. Thank you for your valuable information.

ASSISTANT: Thank you for choosing us.