You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am looking for a flight from IAH to DEN, can you help me in booking?

ASSISTANT: Sure, please provide your travelling dates.

USER: Sure, my planned travel dates are Feb 03 and Feb 05.

ASSISTANT: Do you have any class preference?

USER: I need a flight in a business class.

ASSISTANT: Do you have any connection preference?

USER: I am looking for a connecting flight.

ASSISTANT: May I know your name?

USER: Myself Larry Garcia.

ASSISTANT: Sorry, there is no flight available with your requirements.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: You are welcome, have a nice day.