You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to travel from DCA to SFO. Can you help me to book a flight ticket?

ASSISTANT: Sure, On which dates would you like me to book a flight ticket for you?

USER: I want to travel in the flight on May 20 and May 22.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: Anthony Jackson.

ASSISTANT: Let me know your connection limit?

USER: I want to travel in a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

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

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for choosing us.