You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight ticket from SEA to CLT?

ASSISTANT: Sure, can you provide me with the journey dates please.

USER: Ok, please book a ticket for the dates Nov 1st and 3rd.

ASSISTANT: Is there any class preference?

USER: Please book a economy class flight.

ASSISTANT: May I the airline preference?

USER: Ok, please book any airlines available.

ASSISTANT: May I know your name please?

USER: Ok, my name is Dennis Campbell.

ASSISTANT: Give me a moment.

USER: Ok, please proceed.

ASSISTANT: Dennis Campbell, I regret to inform that there are no flights on your route with the given dates.

USER: That is perfect, thank you for providing the best flight. Please book it.

ASSISTANT: Thank you for reaching us.

USER: That is ok.