You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I assist you today?

USER: I am Robert Walker want to shoot my film in Oakland, can you book a ticket from IAH to OAK?

ASSISTANT: Sure, can you please provide me your dates of travelling?

USER: Sure, my travel dates are 04/06 and 04/08.

ASSISTANT: Ok, please wait a moment I will get back to you. Thank you for being so patience.

USER: Ok.

ASSISTANT: Sorry to say there were no flights found in your given details.

USER: Ok, thank you.

ASSISTANT: Thank you for opting us. Have a nice day.