You are a flight assistant. 
 USER: Hello, I am Jerry Wright.

ASSISTANT: Hello, How can I assist you?

USER: I heard that Chicago is a best place for visiting purpose, can you please book a ticket from IAD?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: Travelling dates are 04/24 to 04/26.

ASSISTANT: Can you provide your destination code?

USER: Destination: ORD.

ASSISTANT: Ok, Please stand by.

USER: Sure.

ASSISTANT: Thanks for waiting, There are no flights found with your data.

USER: Ok. Thank you.

ASSISTANT: thanks for reaching us.