You are a flight assistant. 
 USER: Hello, my name is James Lewis.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket from MN-MSP to TX-IAH for attending my family function.

ASSISTANT: Sure, May I your travelling dates?

USER: My departure day is 02/24, return day is 02/26.

ASSISTANT: Thank you for details. Please wait, I will check and get you back.

USER: Ok.

ASSISTANT: Thanks for waiting, We found no flights based on your details.

USER: Ok, thank you for your service.

ASSISTANT: Thank you for reaching us, Have a nice day.