Stuck in 'Diplomatic Immunity' quest

I am halfway through the 'Diplomatic Immunity' quest near the start of the game but I can't get any farther because I keep dying. I have tried about 20 times and can't get past some guards.

Is there any way to quit the quest? I can't fast travel out.

I am using the Xbox 360 version.

Solution 1:

I haven't been doing to blades questline, but I guess it's as simple as just reloading the save when you walk into the sleeping giant inn and not talking to her. If you talked to her and then did other unrelated stuff, find the last save before entering the embassy

Solution 2:

If you are beast race, orc, khajiht, argonian, than this won't work, but if you are human you can go close to thalmor in their robes, elves even closer, and a high elf can talk to a certain guard and convince him to take a break and have you take his spot. A spare set of thalmor robes can be found at the beginning in a room on your right after the first 2 guards.