You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Karen Miller, want to book a ticket from IAD to IAH. Will you please help me in booking my ticket?

ASSISTANT: Sure, can you provide the dates?

USER: Sure, my travelling dates are from 04/13 to 04/15.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is a flight available with Delta airlines, shall I book it for you?

USER: Yes, proceed with the booking.

ASSISTANT: Your ticket is confirmed, flight number is 1006.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.