You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Raymond Gonzalez. I want to travel from LAX to DFW. Can you book a flight ticket for me?

ASSISTANT: Yes, please can I know your travel dates?

USER: I want to fly on 04/05 and 04/07.

ASSISTANT: There is no flight available which travel in your route.

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

ASSISTANT: Thank you for choosing our agency.