You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Ryan Anderson, will you help me in booking the flight ticket from SFO to LAS?

ASSISTANT: Sure, I can help you in that. Can I know your planned travel dates please?

USER: My preferable journey dates are May 31 and June 02.

ASSISTANT: Ok, may I know in which class you prefer to travel?

USER: I am comfortable in any class.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a flight with single connection.

ASSISTANT: Fine, please wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

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

ASSISTANT: Thank you for choosing us.