You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please reserve me a flight ticket from IAH to DEN?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, my travel dates are from Oct 30 to Nov 01.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a direct flight.

ASSISTANT: May I know your name for the booking process?

USER: Jeffrey Thomas here.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.