You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kathleen Gonzalez.

ASSISTANT: Kathleen, how can I assist you today?

USER: I would like to collect some information about Carolina's Aviation Museum in The Billy Graham (library) at Charlotte. So, can you please book me a flight ticket within price 200?

ASSISTANT: Sure, please let me know your trip dates.

USER: I have planned to catch my flight on 07/22 and come back on 07/24.

ASSISTANT: May I know your airport codes please?

USER: I am heading from LAX to CLT.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry Kathleen, there is no flight available on you route LAX to CLT.

USER: No problem, I will choose another alternative. Thank you.

ASSISTANT: Most welcome, have a nice day.