You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking my flight ticket from DFW to DTW?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are 01/13 and 01/15.

ASSISTANT: Ok, please wait.

USER: Ok, sure.

ASSISTANT: May I know your name please?

USER: Myself Jessica Johnson.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: Ok, fine hank you for checking.

ASSISTANT: Thank you for approaching us.