How to reserve movie tickets(step by step)?

• I will reserve movie tickets. (I go to a ABC theater online site.)
• What's playing these days? (I go over the list of "select a movie".)

now showing/now playing 正在上映中

opening this week 本週上映

coming soon 近期上映

upcoming movies 預定上映 

• Which one would be fun? I should watch some trailers(=teaser 預告片). (A trailer play, I read synopses.) (synopses 劇情大綱、劇情概要)
• This must be exciting. Don''t tell me that this Saturday afternoon's tickets are sold out. (sold out 全部銷售一空) (I click "select a show time.")

don't tell me (that~)

• Cool, tickets are available. (I go with the 5:30 showing) (go with 選擇、接受)
• 2 for "ticket quantity." (quantity 數量) (I purchase 2 for adults.)
• My discount coupon is good(=valid) until this weekend. (I enter the coupon codes.)
• I've finished booking the tickets. (I write down the reservation numbers.)