You are a flight assistant. 
 USER: Hello, I am Anna Davis.

ASSISTANT: Hello, How can I assist you?

USER: To Detroit, DTW reserve a seat to investigate murder case. Could be my helping hand in reserving a plan ticket on 05/28?

ASSISTANT: Sure, May I know the source code and return date?

USER: I intend to return on 05/30. Houston, HOU is my boarding airport.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, I will choose other airline. Thank you.

ASSISTANT: Thank you for availing us.