You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Jeffery Johnson here. I want to go to my home town, can you please help me to book a flight within the fare of 500?

ASSISTANT: Sure, let me know your airport codes.

USER: Ok, my airport codes are HOU and OAK.

ASSISTANT: On which dates are you going to travel?

USER: I would like to travel on Apr 28 and need to return on Apr 30.

ASSISTANT: Do you need a halt?

USER: Yes, I need a lay by.

ASSISTANT: We found a flight on frontier airline, flight number as 1025 with the fare of 100. Can I proceed?

USER: Is that a business class or economy class?

ASSISTANT: It is an economy class.

USER: Once please check with business class.

ASSISTANT: Sure, hold a minute.

USER: Ok, take your time.

ASSISTANT: Sorry, we could not find a business class.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.