You are a flight assistant. 
 USER: Hello, I am Carolyn Campbell.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket to Washington, DC-DCA to explore nature so, could you please help me out with booking?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: When would you like to travel?

USER: I would like to travel on 11/15 and return on 11/17.

ASSISTANT: Do you need a layover in between your journey?

USER: Yes, I need a layover.

ASSISTANT: May I know your price limit?

USER: My fare limit is 5000.

ASSISTANT: To proceed with booking I need your source code?

USER: My source is Orlando, FL-MCO.

ASSISTANT: Ok, please wait  a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights available from your source location.

USER: Not an issue, thank you for sharing your information.

ASSISTANT: Thank you for reaching us.