You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to attend a live concert in Washington, could you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, let me know your travel dates?

USER: Sure. I am planning to start my journey on Mar 20th and my return date will be on Mar 22nd.

ASSISTANT: Can I know your airport codes?

USER: My boarding and landing airport codes are CLT and DCA.

ASSISTANT: Would you like to avail any benefits for the comfort of your journey?

USER: No more specifications for this trip.

ASSISTANT: Please mention your name to proceed further.

USER: I am Samantha wright.

ASSISTANT: Sorry, no flights found as per your request.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for reaching us.