You are a flight assistant. 
 USER: Hello, I am Dorothy Hall.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to attend a Cultural Event in Atlanta, could you help me in booking a flight ticket from Philadelphia?

ASSISTANT: Sure, I would be happy to help you. When you are planning to depart?

USER: I would like to fly on 04/27.

ASSISTANT: Please, share your boarding and landing airport codes.

USER: My source and destination airport codes are PA - PHL, GA - ATL.

ASSISTANT: How much should be your ticket fare?

USER: I can afford up to 5000.

ASSISTANT: Can I have your arrival date?

USER: I will return on 04/29.

ASSISTANT: Thank you for sharing the details, wait a moment.

USER: Sure.

ASSISTANT: Thanks for being patience, sorry to inform you that, there are no flights available with your requirements.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for approaching us, have a great day.