First of all, in English we often end letters before the sign off with certain phrases. These can be included in most letters and will make your letter seem realistic and polished. For a formal letter, you could use:
If you require any further information, please do not hesitate to contact me. Thanking you in advance for your help, I look forward to hearing from you soon.
For a more informal letter you could use:
If you need to know anything else, just get in touch with me as soon as you can. Thanks a lot for your help and I hope to hear from you soon.
Be careful though! IELTS examiners quite rightly look for writing that has been memorised and just repeated so, if you use expressions like the ones above, make sure that they fit in with the rest of your letter.
Finally you’ll need to sign off your letter. For a formal letter use:
Yours faithfully, OR
Remember the commas (it makes a good impression on the examiner if you use good punctuation) and spell “sincerely” correctly (a lot of people don’t!).
For an informal letter, love is not always appropriate though English speakers use it a lot. Better would be to use:
Ending your Letter ielts data