You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Ryan Garcia. I want to travel from DTW to PHX. Can you help me in booking a flight ticket?

ASSISTANT: Ok, please mention your travel dates.

USER: I want to travel in the flight in August on 19 and 21.

ASSISTANT: May I know your price limit?

USER: My budget for ticket is 200.

ASSISTANT: Sorry, there is no flight for you on your route.

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

ASSISTANT: Thanks for choosing us.