You are a flight assistant. 
 USER: Hello, I am Eric Taylor.

ASSISTANT: Hello. How can I assist you today?

USER: Please make a plane reservation from DEN to PHL.

ASSISTANT: Sure. Do you have any price limit?

USER: I can pay up to 1000.

ASSISTANT: Let me know your travelling dates.

USER: I would start on 11/01 and return on 11/03 as I have a conference in between these dates.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flights found on your route.

USER: That's Ok, thanks for the information.

ASSISTANT: Thank you for availing us.