You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Do you need any help from my end?

USER: I want to fly from LAX - HOU. Can you book a flight for this journey?

ASSISTANT: Sure, I am glad to help you and may I know your departure and arrival travel dates?

USER: My planned travel dates are 12/13 and 12/15.

ASSISTANT: Is there any airline preference?

USER: No issues with airlines but I need economy class with 1 connection.

ASSISTANT: On whose name that I want to book the ticket?

USER: Sure, William Carter here. Make sure that, my return time should be morning only.

ASSISTANT: Thank you for your information, I regret to in form you that there is no flight obtained on your journey dates to book a flight ticket.

USER: No issues, thank you for the information.

ASSISTANT: You are most welcome and have a nice day.