What is the sentence that express disapointment?

It's impossible to give you just *one* sentence that expresses disappointment, as the level and reason for disappointment can vary greatly.

Here are some examples of sentences expressing disappointment, ranging in intensity:

Mild:

* "Oh, that's too bad."

* "I was hoping for something different."

* "Well, that's not quite what I expected."

Moderate:

* "I'm a little disappointed."

* "I'm not happy with the outcome."

* "This isn't what I was hoping for."

Strong:

* "I'm very disappointed."

* "This is a huge letdown."

* "I'm really frustrated with this."

Extreme:

* "I can't believe this happened."

* "I'm crushed."

* "This is a complete disaster."

To give you a more specific sentence, please tell me:

* What caused the disappointment? (e.g., a cancelled event, a bad grade, a broken promise)

* How strong is the disappointment? (mild, moderate, strong, extreme)