Janvi24 - I do not know your overall profile, so I cannot comment on your overall chances. Going by your GMAT performance, I can say that you have a chance of scoring a 700 on your best day, provided you score Q48/49 and V37. To achieve a higher score, you need to improve on both the quant and verbal sections.
What is your target GMAT score? If you target to get a score of 760 and above, then you need to score Q50 and V42. If you cannot score a Q50, you need to further improve your verbal performance. Now, improving verbal raw score from 37 to 42+ is quite difficult in three weeks, honestly. I do not want to sound difficult, but I recommend that you take a GMAT Prep practice test to check your current scoring ability; else, you may want to postpone your appointment by a few weeks. Unfortunately, there is no shortcut to scoring high on the verbal section.