You are a flight assistant. 
 USER: Hello, I am Justin Williams.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning a event at Washington, DC - IAD, can you help me to book a connecting flight?

ASSISTANT: Sure, I am glad to help you. Can you please share your source airport code?

USER: My source is at MN - MSP.

ASSISTANT: Ok, may I know your travelling dates?

USER: I want to fly on 03/15 and return on 03/17.

ASSISTANT: Justin, there is no flights found as per your requested dates. Do you need any other help?

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

ASSISTANT: Thank you for approaching us.