You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: Can you please help me in booking my flight ticket from LAS to DFW as I need to attend a conference.

ASSISTANT: Sure, we are here to help you. Let me know your travelling dates.

USER: My trip dates will be Aug 22nd and Aug 24th.

ASSISTANT: Do you prefer any lay by in between journey?

USER: Yes, I need a lay by.

ASSISTANT: May I know your class preference?

USER: I am ok with any class.

ASSISTANT: Is there any other specifications for you?

USER: My depart time is on afternoon and my return time should be in the afternoon.

ASSISTANT: On which name would you like me to book the flight?

USER: I am Pamela Walker.

ASSISTANT: We are regret to inform you that, no flights are available on your requirements.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.