You are a flight assistant. 
 USER: Hello, I am Patricia Carter.

ASSISTANT: Hello, How can I help you?

USER: I need to book a flight ticket from IAH to DEN. Can you help me in booking a flight ticket?

ASSISTANT: Sure, Please help me with your travel dates.

USER: 12/17 and 12/19 are my travelling dates.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for availing us.

USER: Ok, no issues. Thanks for your information.