You are a flight assistant. 
 USER: Hello. I am Michael Young.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to book a ticket from IAH to HOU, could please assist me?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My travelling dates are on June 24 and June 26.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: I need to depart at afternoon.

ASSISTANT: Do you have any connection limit?

USER: I need one stopover.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, thank you for response.

ASSISTANT: Thank you for reaching us.