You are a flight assistant. 
 USER: Hello, I am Melissa Collins.

ASSISTANT: Hello. How can I  help you?

USER: I would like to travel from LAS to DTW. Can you please help me to book a ticket?

ASSISTANT: Your travelling dates please?

USER: I want to start on July 30 and return on Aug 1.

ASSISTANT: Do you have any other specification?

USER: I need a connecting flight. I want to depart and return in the evening.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.