You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you? May I please know your name?

USER: I am looking for a flight on the route IAD to LAX, can you please find that any airlines providing service on this route? Sure, my name is William Thomas.

ASSISTANT: May I know your travelling dates?

USER: My preferable dates are 07/08 to 07/10. Please check if there is any flight available with 0 connection.

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry to say that there is no flight with 0 connection.

USER: Ok, not an issue.I will book another flight.

ASSISTANT: Thank you for contacting us.

USER: Thank you.

ASSISTANT: Welcome.