You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Matthew Parker.

ASSISTANT: How May I guide you?

USER: I am planning to book a ticket from EWR to JFK. Can you please help me out to book a ticket for me?

ASSISTANT: Matthew Parker, I am here to help you for this. when you are willing to travel?

USER: I am planning to travel on Sept 16 and return back on Sept 18.

ASSISTANT: Do you have any airline preference?

USER: No, my return time should be evening.

ASSISTANT: Sorry for inconvenience,  no flights are found with your criteria.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you very much for utilising our agency.