You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am David Hill. I would like to fly from Philadelphia PA-PHL, can you please assit me in booking a flight ticket to Chicago IL-ORD?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 12/26 and 12/28.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: There is a flight available with number 1008 in UA airline and the ticket price is 200.

USER: Please proceed with the booking.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your response.

ASSISTANT: Your ticket is booked.