You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Lisa Collins.

ASSISTANT: How may I render you at this moment?

USER: I want to travel from EWR to EWR. Can you book a flight ticket for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to travel in the flight on Apr 21 and Apr 23.

ASSISTANT: Ok, please wait for few minutes. We found a AA airline with fare of 100 and a halt in between the journey. Shall I proceed with booking?

USER: Proceed to booking.

ASSISTANT: Your ticket has been confirmed with flight number 1003.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.