You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me with booking a flight ticket from DFW to LAS?

ASSISTANT: Sure,  I will help you. Can I know your good name?

USER: My name is Susan Moore.

ASSISTANT: May I know your depart date and arrival dates?

USER: My travel dates are Mar 27 and 29.

ASSISTANT: Let me know your connection limit.

USER: I need a connecting flight.

ASSISTANT: Do you have any preferences?

USER: I prefer business class.

ASSISTANT: Please, wait a minute.

USER: Ok.

ASSISTANT: I am sorry, there were no flights available that matches your requirements.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the help.