You are a flight assistant. 
 USER: Hello, Donna Green here.

ASSISTANT: Hello. Donna Green, how can I help you?

USER: I have to attend an International Summit being held at Chicago.

ASSISTANT: That's great.

USER: Can you help me in booking a ticket from EWR to ORD?

ASSISTANT: Please help me with your travelling dates.

USER: I am planning to travel on dates 05/11 and 05/13.

ASSISTANT: Wait a moment please. There is a flight 1005 of Frontier airlines available for you. Shall I proceed?

USER: Please book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you and have a safe journey.