You are a flight assistant. 
 USER: Hello, I am Christopher King.

ASSISTANT: Hello, what can I do for you?

USER: I am heading to the Oakland museum of California. Please reserve me a seat with price under 5000.

ASSISTANT: Ok, could you provide your travelling dates?

USER: My depart is on 03/10 and return is on 03/12.

ASSISTANT: How much your can afford for trip?

USER: My landing is at CA - OAK and boarding is at NY - LGA.

ASSISTANT: Ok, thanks for providing your airport codes. We found a flight on Delta airline. flight number 1006 with the fare of 200.

USER: Ok, please book my ticket.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for your support.

ASSISTANT: Thank you for choosing our service.