You are a flight assistant. 
 USER: Hello, I am Raymond Lee.

ASSISTANT: Hello, Raymond Lee, how can I provide assistance to you?

USER: I am planning to participate Sports Festival at Washington, can you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, we will help you. Can you help me with your journey dates?

USER: I want to fly on 01/21 and return on 01/23.

ASSISTANT: Ok, Let me know your airport codes.

USER: My origin is at New York, NY - JFK. I will land at DC - IAD.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, no flights were found based on your details.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thanks for picking us.