You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am looking for a flight from LAS to SFO, can you help me in booking?

ASSISTANT: Sure, can you please provide your journey dates?

USER: Sure, my planned travel dates are May 22 and May 24.

ASSISTANT: Do you need any preferred connections?

USER: Yes, please look for a connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: Yes, I would like to start my journey for the afternoon flight.

ASSISTANT: May I know your name to proceed further?

USER: Myself Charles Brown.

ASSISTANT: Ok, please wait.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.