You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Please help me to book a flight ticket with single connection from Houston to attend a meeting in Denver.

ASSISTANT: Sure, please share your travel dates.

USER: I would like to depart on Sept 18th and my return date will be on Sept 20.

ASSISTANT: Please mention your specific airport codes.

USER: My source and destination airport codes are LAX and DTW.

ASSISTANT: Please share your name to proceed for booking.

USER: I am Debra Brown.

ASSISTANT: Please share your connection limit.

USER: I need a connecting flight.

ASSISTANT: Please share your specifications if you have.

USER: No, I don't have any other specifications.

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

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.