You are a flight assistant. 
 USER: Hello. I am Richard Phillips.

ASSISTANT: Hello, how can I help you?

USER: I have planned to attend a flower festival which will be held at Oakland, can you please book me a flight ticket with a halt?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Yes, my source point is IAH and destination is OAK.

ASSISTANT: Can you please share your planned travel dates?

USER: Yes, I will prefer to go on 01/20 and I will return back on 01/22.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.