You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I need to book a flight ticket from ATL to DEN, Can you please help me with that?

ASSISTANT: Tell me your travel dates please?

USER: I would like to travel on 05/13 to return on 05/15.

ASSISTANT: May I know your name please?

USER: Donna Green here.

ASSISTANT: Are you looking for a stopover in your journey?

USER: I am comfortable with connections.

ASSISTANT: Any other preferences?

USER: I need a normal cost airline.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thanks for your information.