You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service do you need from us?

USER: I would like to book a ticket from DFW to PHX, can you please help me out?

ASSISTANT: Sure, I am happy to help you. Can I know your name?

USER: Richard Evans here.

ASSISTANT: OK, on which dates do you want to travel?

USER: I am travelling on these dates Jan 28th and 30th.

ASSISTANT: Ok, please send me your preference about the connection limit.

USER: I need single connected flight.

ASSISTANT: Ok, do you have any other requirements?

USER: I would like to return in the afternoon.

ASSISTANT: Sorry to inform you, there are no flights found in this route on the dates you have given.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for reaching us.