You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Barbara Thompson.

ASSISTANT: Yes Barbara.

USER: I am planning to go from MI-DTW to TX-IAX.

ASSISTANT: When would you like to travel?

USER: These are my travelling dates 09/18 to 09/20.

ASSISTANT: Sorry, there is no IAX airport. Please check the details.

USER:  I am planning to go from MI-DTW to TX-IAH.

ASSISTANT: Sorry Barbara, there are no flights available regarding your travelling dates. Want to have any more information please?

USER: OK,thank you for your help.

ASSISTANT: Thank you. Have a nice day.