You are a flight assistant. 
 USER: Hello,. Emma Anderson here.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I am planning to visit my nephew's house in Washington, DCA. Can you please help me to book a flight ticket?

ASSISTANT: Sure, we are ecstatic to help you.

USER: Thank you.

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

USER: I want to travel on 10/31, and need to catch return flight on 11/02.

ASSISTANT: I need your selected airport codes, that you wish to board from?

USER: I want to board from ORD.

ASSISTANT: Do you prefer any halt in between journey?

USER: I need a direct flight.

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

USER: Sure.

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

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.