You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please check out is there any flight available between SFO and LAS?

ASSISTANT: Please provide your trip dates.

USER: Thank you for taking my request into consideration, my boarding is on Aug 16 and please book my return ticket on Aug 18.

ASSISTANT: Do you need any connection limit?

USER: Yes, I would prefer maximum of 1 connection.

ASSISTANT: Do you have any other specifications?

USER: No, thank you for asking.

ASSISTANT: May I know your name?

USER: Sure, my name is Ronald Wilson.

ASSISTANT: There are no flights available on your routes.

USER: Oh! Sad to hear that. Anyway, I will find another alternative for my journey. Thank you for the information.

ASSISTANT: Thank you for opting us.