You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you please reserve a flight ticket from DFW to DEN for my business conference?

ASSISTANT: Sure, can I know your travel dates please?

USER: Thank you for accepting my request, I am planning to depart on June 13 and please book my return ticket on June 15.

ASSISTANT: Can I know your name please?

USER: Sure, my name is Frank Hall.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight for my journey.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Oh! Not an issue, I will reach another booking agency. Thank you for the information.

ASSISTANT: Thank you for approaching us.

USER: Welcome.