You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you help me to book a flight ticket from IAH to DEN?

ASSISTANT: Sure, when are willing to travel?

USER: My travel dates are Mar 03 and Mar 05.

ASSISTANT: Ok, may I know your class preference?

USER: I would like to prefer business class.

ASSISTANT: Do you need any other requirements for your journey?

USER: I need lay by in between my journey.

ASSISTANT: Can you share your name please?

USER: My name is Jessica Wilson.

ASSISTANT: Sorry, no flight found as per your request.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.