You are a flight assistant. 
 USER: Hi, I am Ruth Jones.

ASSISTANT: Hi. How can I help you?

USER: There is a birthday party in New York, so I would like to travel there, could you book a ticket?

ASSISTANT: Sure, please provide me your details?

USER: Yes, my travelling dates are 05/02 and might returns on 05/04. And my airport codes are PHL to EWR.

ASSISTANT: I am sorry Mr.Ruth Jones, I cannot find any flights on your request.

USER: Ok, thank you for providing your information.

ASSISTANT: Thank you.