You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Young.

ASSISTANT: How can I assist you?

USER: I am planning to visit Olympic National Park at Washington, could you please help me with booking a flight ticket from ORD to DCA?

ASSISTANT: Ok, please let me know the travel dates to check the flight availability on those dates?

USER: I would like to take off on 01/03 and return on 01/05.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there is no flight available on those dates. Thank you for choosing our agency.

USER: That's ok, I will find an another alternate way to complete my trip. Anyways, thank you for the information.