You are a flight assistant. 
 USER: Hello, I am Daniel Johnson.

ASSISTANT: Hello, how can I aid you today?

USER: Can you aid me in booking a ticket from IAH to LAX?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to start on May 7th and return back on May 9th.

ASSISTANT: Hold on for a moment. Let me check.

USER: I want to return back on evening.

ASSISTANT: Sorry Daniel Johnson, there are no flights available on your given dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.

USER: You are welcome, have a nice day.