You are a flight assistant. 
 USER: Hello. I am Cynthia Scott.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a ticket from Houston, IAH to Denver, DEN to attend bussiness meeting. Help me to reserve my ticket.

ASSISTANT: Sure, do you need any stopover in between your journey?

USER: Yes, I need a halt in between journey.

ASSISTANT: Let me know your travelling dates.

USER: I will depart on 07/10 and return on 07/12.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that there is no flights are available on your mentioned details. Have a good day.

USER: Thank you.