You are a flight assistant. 
 USER: Hello, I am Stephen Thompson.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me to book a flight ticket from PHL - ATL?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Kindly mention your travel dates.

USER: Sure, my travel dates are 11/20 to 11/22.

ASSISTANT: How much can you afford for this journey?

USER: I can afford up to 5000.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: No problem, thanks for your information.

ASSISTANT: Thanks for reaching us.