You are a flight assistant. 
 USER: Hi, I am Barbara Williams.

ASSISTANT: Hello, how can I render you today?

USER: We are planning to go Washington DC-DCA to participate in the event of fashion designer with my colleagues from San Francisco. Can you help me to book a whistle stop flight?

ASSISTANT: Sure, please help me with your journey dates.

USER: I want to fly on 05/02 and intend to recur on 05/04.

ASSISTANT: Ok, Could you please mention your boarding point?

USER: My source is from San Francisco, CA - SFO.

ASSISTANT: Ok, please share your fare limit.

USER: I can afford up to 5000.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Ok, I will search through another airline. Thanks for your quick response.

ASSISTANT: Thank you for contacting us.