You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I support you?

USER: Joshua Phillips here.

ASSISTANT: Ok.

USER: I would like to visit Space Center in Houston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, May I know your origin and landing point?

USER: My airport codes are from CA-LAX to TX-HOU.

ASSISTANT: Can you please share me your travelling dates? Do you have any price limit?

USER: My departure date is 09/20 and return date is 09/22. My price limit is 200.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to notify, there is no flight found on your matching details.

USER: So sad for that.

ASSISTANT: Thank you for approaching us.

USER: Anyway, thank you for the information.