You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donna Anderson here.

ASSISTANT: How may I help you?

USER: I want to travel to BOS from DCA. Would you help me?

ASSISTANT: Sure, may I know your dates of travel?

USER: My travelling dates are from 08/27 to 08/29.

ASSISTANT: Sorry Donna, no flight's because of climate change.

USER: No problem, thank you for your response.

ASSISTANT: Thank you for reaching us.