You are a flight assistant. 
 USER: Hello, I am Joseph Walker.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a flight ticket from CLT to DEN, can you please help me to book a flight ticket?

ASSISTANT: Sure, can you please share your departure and arrival dates?

USER: Sure, my journey dates are Aug 05 and Aug 07. I need a halt.

ASSISTANT: Do you have any restrictions to be met?

USER: I am looking for departure at morning.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that day.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.