You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER:  I am Jack Robinson want to attend Halloween Party at TX-DFW from NY-LGA.

ASSISTANT: Ok.

USER:  Can you book a direct flight?

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: May I know on which dates would you like to travel?

USER: My travel dates are 09/22 and 09/24.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry we did not find any flights matching your details.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for reaching us.