You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you now?

USER: I want to book a flight ticket from IAH to LAS. Can you please help me in that?

ASSISTANT: Sure, please share me your planned journey dates?

USER: My trip dates are Jan 15 to Jan 17.

ASSISTANT: Please mention your connection limit?

USER: I prefer to travel in connecting flight.

ASSISTANT: Do you have any other requirement?

USER: My depart should be in the afternoon.

ASSISTANT: May I know your good name?

USER: Ashley Roberts here.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey data.

USER: Ok, no problem. Thank you.

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