You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Can you help me to book a flight from DTW to LAS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are Apr 27 and 29.

ASSISTANT: On which name shall I reserve flight ticket?

USER: Please book under my name Rebecca Edwards.

ASSISTANT: Any specifications needed?

USER: I prefer connecting flight.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching our service.