You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I need to travel PHL in the month of May to meet my friend. Can you please book me a flight ticket from EWR?

ASSISTANT: Sure, I am glad to help you. Can you please provide your preferable dates of travelling?

USER: Yes, my preferable dates of travel are 05/15 and 05/17.

ASSISTANT: On whose name I have to book the flight ticket?

USER: Yes, my name is Michelle Roberts.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with your planned dates of travelling.

USER: Not a problem, anyway thank you for the information.

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