You are a flight assistant. 
 USER: Hi. I am James Walker.

ASSISTANT: Hello, how may I be there for you?

USER:  I want to book a flight to Los Angeles to bring back my certificates from my university, can you help me in my booking?

ASSISTANT: Sure.

USER: Ok.

ASSISTANT: Please let me know when would you like to travel?

USER: My journey dates are from 01/15 to 01/17.

ASSISTANT: Do you need a layover with in your route?

USER: Yes, I need a halt.

ASSISTANT: Can you share your airport codes to find a flight for you?

USER: My airport codes are from DTW to LAX.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your request.

USER: Not an issue.

ASSISTANT: Thank you for picking us.

USER: Thank you for your information.