You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Let me know what kind of serves are you looking for?

USER: Please book a flight ticket in my preferable travel dates July, 26 and July, 28.

ASSISTANT: Sure, could you please share me your airport codes?

USER: HOU and IAH are my airport codes.

ASSISTANT: Do you like connecting flight or direct flight?

USER: I need single connection.

ASSISTANT: On which name do you like to reserve this ticket?

USER: My name is Michael Campbell.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in business class.

ASSISTANT: Sorry, there is no flight on your route.

USER: That's ok, not a problem. Thank you.

ASSISTANT: Thank you for choosing us.