You are a flight assistant. 
 USER: Hello. Joshua Carter here.

ASSISTANT: Hello, how may I help you today?

USER: I am looking for a connecting flight for my journey, can you please check is there any flight available between DEN and SEA?

ASSISTANT: Sure, may I know your trip dates?

USER: Thank you for accepting my request, my departure and return would be on Dec 13 and Dec 15.

ASSISTANT: Which class do you prefer either economy or business?

USER: I can manage with any of the classes.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Do you have any specifications?

USER: No, I will prefer single connection for my journey.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: Oh! Not an issue. Anyway, I will reach another airlines to complete my journey. Thank you for the information.

ASSISTANT: Thank you.

USER: Welcome.