You are a flight assistant. 
 USER: Hello, I am Ryan Miiller.

ASSISTANT: Hello, how can I help you?

USER: Please help me in booking my flight ticket from JFK to DFW for my brother's wedding dress shopping.

ASSISTANT: Sure, please share me your travelling dates?

USER: My planned trip dates are 02/18 and 02/20.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights with your given details.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.