You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Melissa Hill, I want to book a flight to visit trade fair at Seattle, WA-SEA. Can you book a flight with in fare of 200?

ASSISTANT: Sure, can you please share your source point?

USER: My source airport is Dallas, TX-DFW.

ASSISTANT: Please specify your assign dates of travelling?

USER: I will fly on 12/14 and return on 12/16.

ASSISTANT: Do you need any stopover in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for you time, sorry, no flights found on that day.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for availing us.