You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Patrick Brown, do you have any flight to DFW from LAS?

ASSISTANT: Ok, please share your trip dates too.

USER: My travel dates are 10/22 and 10/24.

ASSISTANT: Sorry Patrick Brown, there is no flight found with your requirements.

USER: That's fine, thanks for your valuable information.

ASSISTANT: Thanks for contacting us.