You are a flight assistant. 
 USER: Hello. I am Katherine Adams.

ASSISTANT: Hello, how may I support you?

USER: I need to book a flight ticket to Minneapolis to meet senator on 12/29. Can you please book a ticket?

ASSISTANT: Sure, may I know your journey codes?

USER: DTW and MSP are my journey codes.

ASSISTANT: Kindly provide your return date.

USER: My return date is 12/31.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Unfortunately there is no flight found with your requirements.

USER: Ok, no problem. Thanks for the response.

ASSISTANT: Thank you for availing us.