You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: My name is Ryan Harris. I need to attend workshop in Smithsonian Institution at Washington, DCA. So, could you please hold me a flight ticket with a stopover?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: When you are planning to travel?

USER: I will prefer to travel on 10/26 and 10/28.

ASSISTANT: From where would you like to start?

USER: I will catch my flight from OAK.

ASSISTANT: Do you have any price limit?

USER: Yes, I can afford up to 1000.

ASSISTANT: Thank you for sharing the details, please wait a while.

USER: Ok.

ASSISTANT: Thank you for your valuable time. Sorry to inform you, currently no flights are running to that locations due to abnormal weather conditions.

USER: No problem, thank you for your response.

ASSISTANT: Thank you for availing us.