You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I am Larry Hall. I want to see a live football match at Fort Worth. Can you be my helping hand in booking a ticket from DCA to DFW.

ASSISTANT: Ok, May I know the travelling dates?

USER: My preferable dates are from 10/14 to 10/16.

ASSISTANT: Sorry to tell that there is no flight found based on your requirements.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT:  Thank you for reaching us.