You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: Myself Larry Adams. I would like to visit Lincoln Memorial in Washington. Can you help me for booking flight ticket from OAK to IAD?

ASSISTANT: Sure, I will help you with that. Please provide me your travel dates.

USER: My travel starts from 04/17 to 04/19.

ASSISTANT: Please give me a moment.

USER: Make sure that connection limit is 1.

ASSISTANT: Thank you for waiting. Sorry Larry, no flight is available to you on your dates. Thank you for reaching us.

USER: Ok, that's fine. Thank you for your services.

ASSISTANT: You are welcome, have a good day.