You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Phillips.

ASSISTANT: How may I help you today?

USER: I want to meet my family at Detroit, DTW. Can you help me out in booking a flight ticket under the range of 500?

ASSISTANT: Sure, I will help you. When would you like to travel?

USER: My travelling dates are from 07/29 to 07/31.

ASSISTANT: Help me with the source code?

USER: My source code is Charlotte, CLT.

ASSISTANT: Thank you for the details, we found that no flights were running at that locations.

USER: Ok, No problem. Thanks for the information.

ASSISTANT: Thank you for reaching us.