You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Mary Perez here, I want to reserve my ticket from SEA to EWR, can you please help me?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my preferable dates of journey are from Feb, 20 to Feb, 22.

ASSISTANT: Do you prefer economy or business class?

USER: Yes, I need a economy class.

ASSISTANT: We found a economy flight on your details with airline Delta, flight number: 1003.

USER: Ok, you can book it.

ASSISTANT: Shall I book this ticket? Ok. Your ticket has been reserved.

USER: Thank you for your help in booking.

ASSISTANT: Thank you.