You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Andrew Williams. Please help me in booking a flight ticket from DEN to HOU.

ASSISTANT: Sure, please share your journey dates?

USER: My travel dates will be 02/24 and 02/26.

ASSISTANT: Do you have any other specifications to be met?

USER: I want to travel in business class with connecting flight.

ASSISTANT: Sorry, no flights found on your given details.

USER: It's ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.