You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I  help you?

USER: Kevin Collins is here. Can you please help me in making an airline reservation from LAS to DCA?

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are May 5th and May 7th.

ASSISTANT: Do you have a specifications?

USER: The depart time should be morning. I will prefer to travel with normal-cost.

ASSISTANT: Just a moment please.

USER: Sure.

ASSISTANT: What about your connection limit?

USER: I need a single connection.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.