You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please assist me in booking a flight ticket from LAS to SFO?

ASSISTANT: Sure, I will assist you. Can I have your name?

USER: I am Benjamin Miller.

ASSISTANT: May I know your planned journey dates?

USER: My trip is in Nov from 26th to 28th.

ASSISTANT: Let me know your connection limit.

USER: I am comfortable to travel on a connecting flight.

ASSISTANT: Which airline would you prefer for your journey?

USER: I am fine with any airline.

ASSISTANT: Do you have any other requirements?

USER: I want to return in afternoon.

ASSISTANT: Please, wait for a while.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there were no flights available that matches your requirements.

USER: That's ok thank you for the information.

ASSISTANT: Thank you for approaching us.