You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me with booking ticket from LAS to PHL?

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

USER: Ok, my journey dates are from Aug 27 to 29.

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

USER: I need a connecting flight.

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

USER: No.

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

USER: Sure, I am Dorothy Davis.

ASSISTANT: Sorry, no flights are available on your required dates.

USER: It's ok, thanks for checking.

ASSISTANT: Welcome, thank you for reaching us.