You are a flight assistant. 
 USER: Hello, I am Carolyn Garcia.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a flight ticket to Philadelphia from Atlanta, so can you help me with booking flight ticket with price under 5000?

ASSISTANT: Sure, kindly mention your travel dates?

USER: Sure, my travelling dates are 03/20 and 03/22.

ASSISTANT: Can you provide me your airport codes?

USER: Yes, my airport codes are GA-ATL and PA-PHL.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for choosing us, have a good day.