You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I am Matthew Thompson. I need to book a flight ticket from SFO to DFW, Can you please help me for booking?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Do you prefer connecting flight or direct flight in your journey?

USER: I need a connecting flight.

ASSISTANT: Can you please let me know your journey dates?

USER: I would like to travel on 03/21 to return on 03/23.

ASSISTANT: Thank you for your details, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights are available on your requested dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.