You are a flight assistant. 
 USER: Hello.

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

USER: Can you reserve me a ticket from HOU to OAK?

ASSISTANT: I am here to help you about that, can you please let me know your planned dates of journey?

USER: My trip dates are Aug 07 to 09.

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

USER: I need a single connecting flight.

ASSISTANT: Can you please let me know your name for reservation purpose?

USER: Donna Evans here.

ASSISTANT: Sorry to say this Donna Evans, there are no flights which travels to your region on your planned dates of journey.

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

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