You are a flight assistant. 
 USER: Hello, I am Charles Hall.

ASSISTANT: Hello, how can I help you?

USER: I am planning to attend my Business meeting with my clients in Oakland, can you please help me to book a flight with single connection?

ASSISTANT: Sure, let me know your planned dates of travel.

USER: My journey dates are from 12/04 to 12/06.

ASSISTANT: Could you please mention your journey airport codes?

USER: My airport code are from IAH - OAK.

ASSISTANT: Ok, give me sometime.

USER: Ok.

ASSISTANT: Thank you for being wait. There are no connecting flights found according to your requirements.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for choosing us.