You are a flight assistant. 
 USER: HI, I am Christine Hall.

ASSISTANT: Hello, how can I serve you today?

USER: I want to book a flight ticket to Oakland to visit Oakland museum of California.

ASSISTANT: Ok.

USER: Please help me with booking a flight ticket?

ASSISTANT: Let me know your travelling dates.

USER: Travelling dates are 05/24 and 05/26.

ASSISTANT: May I know your airport codes?

USER: Airport codes are IAH-OAK.

ASSISTANT: Do you have any price limit?

USER: Make sure the price limit is under 200.

ASSISTANT: Thanks for being patience, there is no flight available with price 200.

USER: You can proceed with booking. Ok, no issues. Thanks for the help.

ASSISTANT: Thank you.