You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning. How can I help you?

USER: Good Morning. I want to travel from LAX to DFW to attend a small business meet. Will you please help me in booking my ticket?

ASSISTANT: Sure, May I know your travel dates?

USER: My travel dates are from 03/27 to 03/29.

ASSISTANT: Please share your name?

USER: My name is Mark Edwards.

ASSISTANT: As per your preferred dates, there is no flight available, Mark Edwards.

USER: Oh! It's ok, thank you for your help.

ASSISTANT: You are welcome. Have a nice day.