You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you for today?

USER: I want to book a ticket from PHX to DEN, can you help me?

ASSISTANT: I am here to help you about that. Can you please let me your planned dates of journey?

USER: My travel dates are 09/09 and 09/11.

ASSISTANT: Do you have any other requirements for your journey?

USER: I want to a direct flight.

ASSISTANT: Can you please provide your name for fiurther proceeding?

USER: I am James Allen.

ASSISTANT: Sorry to say this James Allen, there are no flights which travels to your region.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome, thank you for reaching us.