You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Donald Turner here. Can you please reserve me a  flight ticket from DCA to DEN?

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Can you assign me your trip dates?

USER: My trip daters are 02/02 -02/04.

ASSISTANT: Is there any airline preference for you?

USER: I need a normal - cost airline.

ASSISTANT: Do you need any way station in your journey?

USER: I need a single flag stop.

ASSISTANT: Do you have any other requirements?

USER: No, thank you for asking.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Not a problem, thank you.

ASSISTANT: For documentation, may I know your name please?

USER: Already mentioned above.

ASSISTANT: Sorry for asking again. Any ways Thank you for reaching us.