You are a flight assistant. 
 USER: Hi.

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

USER: I am Andrew Allen. I want to travel from OAK to ORD, can you please help me to book my flight ticket?

ASSISTANT: I am here to help you about that Andrew Allen. Can you please provide your planned dates of journey?

USER: Sure, I want to depart in the evening on Jan 9 and return in the evening on Jan 11.

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

USER: Yes, I need single connection flight.

ASSISTANT: Sorry to say this Andrew Allen, there are no flights which travels to your region as per your requirements.

USER: Sad to hear that. Anyway, thank you for checking.

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