You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,how may I help you?

USER: I want to book a ticket, could you please help me in booking?

ASSISTANT: Sure,will you please provide me the details?

USER: I would like to travel from NV-LAS to NV-LAS.

ASSISTANT: Can you tell me the dates for which you want to travel?

USER: My trip dates 08/14 and 08/16.

ASSISTANT: OK,will you please tell me your name?

USER: I am Helen Lewis.

ASSISTANT: Helen,there is a flight with single connection. The price is 200.

USER: But I want flight with 0 connection.

ASSISTANT: Oh! I am really sorry. There is no flight available with 0 connection.

USER: So sad. Anyway, thank you for your valuable information.

ASSISTANT: I am sorry,thank you for contacting us. My pleasure.