You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gary Thompson here.

ASSISTANT: In which way I can aid you at this moment?

USER: I would like to travel from SFO to IAH. Can you help me in booking a flight ticket?

ASSISTANT: Sure. Could you please mention your preferable travel dates?

USER: My preferable  travel dates are Aug 05 and Aug 07.

ASSISTANT: Do you have any another specifications?

USER: Yes, I prefer to book my ticket in economy class and I need a  connecting flight in my journey.

ASSISTANT: Ok, please hold on a moment. Sorry no flights are available in this route as per your requested dates.

USER: Not a problem. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.