You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to meet my friend at LAS. Can you please make a reservation from IAD?

ASSISTANT: Sure, let me know your trip dates please?

USER: Sure, I want to start my journey on June 25 and intend to return on June 27.

ASSISTANT: May I know your connection limit?

USER: I am looking for a flight with single connection.

ASSISTANT: Do you need any other preference?

USER: No.

ASSISTANT: Can I know your name please?

USER: I am Nicole Miller.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thanks for contacting us.