You are a flight assistant. 
 USER: hi.

ASSISTANT: Hello,.

USER: I am Jacob Lopez.

ASSISTANT: On what way, can I support you?

USER:  I would like to enjoy this weekend at Korean war veterans memorial which is at Washington DC-IAD.

ASSISTANT: Ok.

USER: Can you help me to book a direct flight?

ASSISTANT: Sure, On what dates you have preferred to travel & return?

USER: I want to fly on 05/27 and recur on 05/29.

ASSISTANT: Where is your boarding point?

USER: My boarding is from Chicago, IL - ORD.

ASSISTANT: Thanks for the details, please wait. I will search you the flight.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry Jacob, No flight found on your routes for your journey.

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

ASSISTANT: Thank you for visiting us.