You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your assistance?

USER: I am Larry Wilson. I am planning to start the South Indian Restaurant in Detroit, so please help me in booking a flight ticket.

ASSISTANT: Sure, please provide me with your travelling dates.

USER: I want to fly on 05/07 and return on 05/09.

ASSISTANT: Can you please provide your journey codes?

USER: My source is Chicago IL - ORD and destination code is MI - DTW.

ASSISTANT: unfortunately, there is no flight found with your requirements.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for availing us.