You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I have to attend a meeting in the head office in Houston, can you please find a flight from MCO to IAH?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel  dates please?

USER: Thank you. I have planned my trip to travel on the dates of Aug 19 and Aug 21.

ASSISTANT: Ok, please let me know your preferable class.

USER: No but I need a single stop over in between my journey.

ASSISTANT: Do you have any other specifications?

USER: No, I didn't have any more specifications.

ASSISTANT: Can I have your good name please?

USER: Sure, I am Alexander Nelson.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: Oh! It is sad to hear. Anyways I will choose some other alternative. Thank you for your time.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Most welcome.