You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to go Las Vegas to celebrate my brother birthday. Please help me to do the reservation.

ASSISTANT: Sure, I am here to assist you. May I know your planned dates of travelling?

USER: Trip dates are 03/23 and 03/25.

ASSISTANT: Help me with the source and destination codes.

USER: My airport codes are DCA-LAS.

ASSISTANT: Do you have any price limit?

USER: Price should not cross 1000.

ASSISTANT: May I know your name please?

USER: I need a connecting flight. I am Nicholas Robinson.

ASSISTANT: Thank you for providing us the details, please be on hold.

USER: Ok.

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

USER: No problem, I will check with another airline. Thanks for the information.

ASSISTANT: Thank you for reaching us.