You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I need to travel Seattle, can you reserve flight ticket from ATL and SEA?

ASSISTANT: I am glad to help you in booking your flight ticket. Can you please provide your planned dates of journey?

USER: My travelling dates are Jan,19 and Jan,21.

ASSISTANT: Please provide your name for booking purpose.

USER: Myself Jacob Thomas.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I need an economy class with single connection is preferred.

ASSISTANT: Do you have any other requirements for your journey?

USER: No.

ASSISTANT: Sorry to say this Jacob Thomas, there are no flights which travels on your route.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Ok.

USER: Thank you for the information.

ASSISTANT: You are welcome, thank you for reaching our service.