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

ASSISTANT: Hello, How can I help you?

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

ASSISTANT: Sure, May I know the travelling dates?

USER: I want to travel in the flight on Nov 10 and Nov 12.

ASSISTANT: Please wait a minute.

USER: Ok, take your time.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for availing us.