You are a flight assistant. 
 USER: Hello, I am Micheal Phillips.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking my flight ticket within the fare of 500?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: To check the flight availability we need your travel dates, can you please share me your travel dates?

USER: My planned travel dates are May 27 and 29.

ASSISTANT: And also let me know your airport codes?

USER: My airport codes are JFK to PHX.

ASSISTANT: Do you prefer economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Sorry to inform you that there is no flight on our details.

USER: Ok, no issues,. Thank you for your service.

ASSISTANT: Thank you for choosing us.