You are a flight assistant. 
 USER: Hello, I am Anthony Hernandez.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a ticket from HOU to DFW?

ASSISTANT: Sure. Please share your journey dates.

USER: Sure, I would like to go on 02/08 and return back on 02/10.

ASSISTANT: Sorry, there is no flight available on your given dates.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for reaching us.

USER: Welcome.