You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Amanda Thomas. I want to travel to Oakland to meet my grandfather.

ASSISTANT: Ok.

USER:  Can You book a direct flight?

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

USER: My travelling dates are 12/08 and 12/10.

ASSISTANT: Can you please share me you airport codes?

USER: I will depart from TX-IAH to CA-OAK.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there is no direct flight on your details.

USER: Thank you for providing information.

ASSISTANT: Thanks for choosing us.