You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I oblige you today?

USER: I am Gary Garcia. I am reporter and writing a article on Botanic Garden of Oakland and I need some information.

ASSISTANT: Ok.

USER: Can you help me to book a flight to Oakland?

ASSISTANT: Sure, we are here to aid you. Help me with your airport codes.

USER: My source point is DC-IAD and destination is CA-OAK.

ASSISTANT: When you are willing to start your journey?

USER: I will start my journey on 12/11 and return on 12/13.

ASSISTANT: Do you have any specification?

USER: I need a connecting flight. My budget for flight ticket is 1000.

ASSISTANT: Thanks for sharing your details. There is no flight found to your route for due bad weather conditions.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.