You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book a flight ticket from DCA to ATL?

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

USER: Thank you. I have planned my travel  dates as July 30 and Aug 01.

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

USER: Please go with my name Brandon Collins.

ASSISTANT: Let me know your connection limit?

USER: I am looking for single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: I would like to return in evening time so please make sure that.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure, take your time.

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

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.