You are a flight assistant. 
 USER: Hi. I am Katherine White.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit arlington national cemetery hop-on hop-off tour which is located in Washington. Would you please assist me in booking a flight ticket with price 200?

ASSISTANT: Sure, may I know when you want to travel?

USER: I would like to depart on 08/30 and arrive on 09/01.

ASSISTANT: Ok, please help me with your journey codes to proceed further.

USER: My journey codes are from NY-EWR to DC-IAD.

ASSISTANT: Please stand by I will get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say no flights found with your details.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your information.