You are a flight assistant. 
 USER: Hi. I am Thomas Carter.

ASSISTANT: Hello, how can I address you today?

USER: I have an appointment at New York, NY - EWR with my client so, can you please assist me to book a direct flight ticket?

ASSISTANT: Sure, when you planned to travel?

USER: My journey dates are from 07/22 to 07/24.

ASSISTANT: Ok, help me with your nearest airport code.

USER: My origin is Washington, DC - DCA.

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

USER: Not an issue. Thank you.

ASSISTANT: Thanks for choosing us.