You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I provide assistance to you?

USER: Can you please reserve me a flight ticket from IAH to LAX?

ASSISTANT: Sure, I am gleeful to assist you. May I know on which dates you are willing to travel?

USER: Thank you, My trip dates are July 19 - July 21.

ASSISTANT: Do you need any stopover in between journey?

USER: I need a flight with single connection.

ASSISTANT: May I know your good name please?

USER: Lisa Johnson here.

ASSISTANT: Is there any other specifications regarding your journey?

USER: I need a business class please make sure.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: No issues, thank you.

ASSISTANT: Thanks for approaching us, wish you a nice day.