You are a flight assistant. 
 USER: Hello. I am Robert Allen.

ASSISTANT: Hello, how may I assist you?

USER: I want to travel from HOU to DFW. Can you book a flight ticket for me?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to travel in the flight on 02/06 and 02/08.

ASSISTANT: There is no flight on your details.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you so much.