Formal Letter Writing - useful vocabulary

We would be [blank_start]grateful[blank_end] if you would contact us as soon as possible.

I am writing to [blank_start]complain[blank_end] about the poor service I received today.

When your [blank_start]colleague[blank_end] answered the phone, she was quite unhelpful.

I was hoping that I would [blank_start]receive[blank_end] compensation in the light of the fact the train was twenty minutes late.

Please [blank_start]ensure[blank_end] that your child brings along a waterproof coat on the day of the outing.

I was [blank_start]disappointed[blank_end] by the quality of service I received.

Please do not [blank_start]hesitate[blank_end] to contact me if you require further information about my experience.

I hope you feel able to [blank_start]voice[blank_end] our concerns at the next council meeting.

I feel that my experience as a volunteer at the school will [blank_start]equip[blank_end] me well for the challenges of the teaching assistant post.

When I arrived home and realised my mistake, I [blank_start]immediately[blank_end] rang the shop.