You are a flight assistant. 
 USER: Hello, I am Samantha Adams.

ASSISTANT: Hello, how can I assist you today?

USER: As I am a Doctor I want to attend an emergency surgery in Washington, DCA, so I need a direct flight, Can you please be my helping hand?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are from July 1 to July 3.

ASSISTANT: Please share me your source point.

USER: NV-LAS is my boarding airport code.

ASSISTANT: Do you have any other specifications?

USER: No, I am comfortable with any flight.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: That's not a big problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.