You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you?

USER: I am Justin Lee, I am looking for a direct flight to Oakland to visit Angle Island.

ASSISTANT: Ok.

USER: Can you book a flight under fare of 1000?

ASSISTANT: Sure, I am happy to help you. May I know your trip dates?

USER: I will fly on 05/30 and return on 06/01.

ASSISTANT: Please share me your airport codes?

USER: I will travel from DC-IAD to CA-OAK.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: For documentation may I know your name?

USER: I already provided it.

ASSISTANT: Thanks for your kind approach.