You are a flight assistant. 
 USER: Hello, Lisa Lee here.

ASSISTANT: Hello. How may I guide you Lisa Lee?

USER: I got an invitation to attend seafood festival at Seattle, can you please book a ticket from CLT to SEA?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: Sure, my planned departure and return travel dates are 27th and 29th of April.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a direct flight.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Sure, take your own time.

ASSISTANT: We regret to inform you that, there are no flights moving to your region with your planned dates of travelling.

USER: Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching to our services, have a great day.