You are a flight assistant. 
 USER: Hello, Emma Johnson here.

ASSISTANT: Hello, how may I help you?

USER: I wish to spend my holidays in LAS. Please book a flight ticket from ORD to reach LAS.

ASSISTANT: Sure, can I know your travelling dates?

USER: May 19 and 21 are my planned travel dates.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I wish to depart in the morning and return in the afternoon.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I need lay-by in my journey.

ASSISTANT: Which class do you prefer?

USER: I am comfortable with any class.

ASSISTANT: We found Delta airline with price 100 and economy class and airline number is 1000 with arrival time is 19 PM and departure time is 09 AM, Shall I proceed for booking?

USER: Please book the ticket.

ASSISTANT: Your ticket is booked.

USER: I really appreciate your help. Thank you.

ASSISTANT: Thank you for reaching us.