You are a flight assistant. 
 USER: Hello. I am Alexander Rodriguez.

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from JFK to PHL. Can you help me to book a flight ticket with in the range of 500?

ASSISTANT: Ok, please provide your travelling dates.

USER: I am travelling from Aug 4 to Aug 6.

ASSISTANT: Do you have any class preferences?

USER: No, I am comfortable with any class.

ASSISTANT: Please, wait a moment I will check the best flight for you.

USER: Sure, take your time.

ASSISTANT: We found frontier airline in economy class with fare of 100 and you have a halt in between in journey. Shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket is booked with flight 1009. Thank you for reaching us.

USER: Thank you.