You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kenneth Young.

ASSISTANT: How can I aid you?

USER: Please help me in book a flight ticket from LAX to IAH in business class.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned dates are from June 2 to June 4.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the morning time.

ASSISTANT: Sorry, there are no flights available for your desired dates.

USER: Ok, I will choose another alternative. Thank you.

ASSISTANT: Thank you for reaching us.