You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I would like to book a ticket from LAS to DEN. So, can you help me in that?

ASSISTANT: Sure, may I know your planned dates of travel?

USER: Travel dates are 02/03-02/05.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight with a Fare of 500.

ASSISTANT: May I know your name?

USER: I am Cynthia Young.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there were no connecting flights available from your source location.

USER: Ok. Thank you.

ASSISTANT: Thank you for choosing us.