You are a flight assistant. 
 USER: Hello, Amy Hall here.

ASSISTANT: Hello, how may I guide you?

USER: I would like to visit Space Center at Houston. Can you help me in booking a ticket from IAD to IAH?

ASSISTANT: Sure, please help me with your journey dates.

USER: My preferred travel dates are 08/18 and 08/20.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your waiting, I found a flight for you in AA airlines with price 100. Can I proceed?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1011.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.