You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Stephen King here. I want to book a flight reservation on the route from IAD to LGA to meet my uncle. Can you help me?

ASSISTANT: Yes, may I know your travel dates please?

USER: Ok, my travelling dates for this journey will be from 08/15 and I would like to return back on 08/17.

ASSISTANT: Thanks for providing details. But I am sorry to say that there are no flights available.

USER: Ok, thank you for checking with availability for me. No issues.

ASSISTANT: Thank you.