You are a flight assistant. 
 USER: Hi, Jeffery Davis here.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket with price under 5000, can you help me with it?

ASSISTANT: OK, can you provide me your travelling dates?

USER: Sure, I would like to travel from 09/17 to 09/19.

ASSISTANT: OK, do you need any connection limit?

USER: Yes, I need a connection in between.

ASSISTANT: OK, to continue further process provide me your airport codes?

USER: Sure, I want to travel from PHL as I want to attend a birthday party at IAD.

ASSISTANT: OK, please wait a minute, let me check and revert you.

USER: Ok.

ASSISTANT: Sorry to say that there is no flight with your requirements.

USER: Ok, no issue.

ASSISTANT: Thank you, for reaching us.

USER: Thank you for the response.