You are a flight assistant. 
 USER: Hello, I am Joshua Evans.

ASSISTANT: Hello, how may I help you?

USER: I am planning to go for an occasion in Detroit, can you please help me to book a flight ticket?

ASSISTANT: Sure, when would you like to travel?

USER: My travelling dates are from 09/22 to 09/24.

ASSISTANT: Please, share the airport codes of your journey.

USER: I am travelling from PHL to DTW. Make sure that my price limit is 200 with one connection.

ASSISTANT: Sorry, we did not find any flight on that date.

USER: Ok, no issues.

ASSISTANT: Thanks for opting us.

USER: Thanks for your service.