You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Andrew Williams, can you help me in booking my flight ticket from DFW to LAS?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My trip dates will be Aug 23rd to Aug 25th.

ASSISTANT: Do you have any connection limit?

USER: I need a stopover in between my journey.

ASSISTANT: May I know your arrival and depart timings?

USER: My depart time is in the morning.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for availing us.