You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Matthew Robinson.

ASSISTANT: How can I assist you?

USER: Can you please help me in making an airline reservation from DFW to PHX?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My planned travel dates are July 16th and July 18th.

ASSISTANT: May I know your class preference please?

USER: I don't have any class preference.

ASSISTANT: Do you have any specifications regarding departure and arrival time?

USER: My arrival time should be afternoon.

ASSISTANT: Please let me know if you have any other specifications.

USER: I need a connection limit.

ASSISTANT: Sorry, there are no flights available on those dates with your given details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.