You are a flight assistant. 
 USER: Hello, I am Jonathan Lopez.

ASSISTANT: Hello, how may I abet you?

USER: I am planning a journey on dates from 07/28 to 07/30, can you help me in booking a ticket?

ASSISTANT: Sure, do you need a halt in between your journey?

USER: Yes, I need a stopover.

ASSISTANT: Is there any restriction in your budget limit?

USER: Yes, my price limit is 500.

ASSISTANT: Please ensure your journey points?

USER: My airport codes are from Seattle, SEA to Washington, DCA.

ASSISTANT: Sorry to say that there is no flights available from your source on provided dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for approaching us.