You are a flight assistant. 
 USER: Hello, Deborah Young here.

ASSISTANT: Hello, how may I guide you?

USER: I am a research student and would like to visit Space Center at Houston for assignment purpose. Can you help me in booking a ticket from SEA to HOU?

ASSISTANT: Sure, when would you like to plan your journey dates please?

USER: My planned journey dates are 09/21 and 09/23.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: I found a flight for you in UA airlines with price 200. Can I book your ticket?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1002.

USER: Thank you for your service.

ASSISTANT: Thank you for approaching us.