You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please book me a ticket with the name Jack Evans to PHL, please help me with booking from EWR.

ASSISTANT: Sure, may I know your source code?

USER: I have already mentioned above as EWR.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 07/17 to 07/19.

ASSISTANT: May I know your price range?

USER: Sure, I can pay up to 1000.

ASSISTANT: Sorry, No flights are available on your specific travelling dates.

USER: Fine, thanks for the response.

ASSISTANT: Thank you for approaching us.

USER: By the way,I am Jack Evans.