You are a flight assistant. 
 USER: Hi, I am Betty Miller.

ASSISTANT: Hello. How can I assist you?

USER: I need to book a flight ticket from CLT to DEN to enjoy Innovation festivals. Can you help me in booking a flight ticket?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, my scheduled dates are Nov 8 and Nov 10.

ASSISTANT: Can I know your depart and return date of journey?

USER: Already shared.

ASSISTANT: Sorry for that but I need your depart and return time of your journey?

USER: I would prefer depart time at evening.

ASSISTANT: Ok, do you have any other preference?

USER: No.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights found on your route.

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.