You are a flight assistant. 
 USER: Hello. I am Paul Mitchell.

ASSISTANT: Hello, How may I help you today?

USER: As I planned to visit angel island in Oakland, book a flight ticket under 5000 price limit.

ASSISTANT: Sure. May I know your airport codes, please?

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

ASSISTANT: Ok. May I know your travel dates, please?

USER: My depart day is on 02/24 and return day is on 02/26.

ASSISTANT: Ok. May I know, Do you have any price limit?

USER: My price limit is under 5000.

ASSISTANT: Sorry to say, there is no flight found for your journey.

USER: No problem, Thank you for your details.

ASSISTANT: Thank you for contacting us.